1、原生JavaScript實現字串長度截取
function cutstr(str, len) {
var temp;
var icount = 0;
var patrn = /[^\x00-\xff]/;
var strre = “”;
for (var i = 0; i < str.length; i++) {
if (icount < len – 1) {
temp = str.substr(i, 1);
if (patrn.exec(temp) == null) {
icount = icount + 1
} else {
icount = icount + 2
}
strre += temp
} else {
break
}
}
return strre + “…”
}
2、原生JavaScript獲取功能變數名稱主機
function getHost(url) {
var host = “null”;
if(typeof url == “undefined”|| null == url) {
url = window.location.href;
}
var regex = /^\w+\:\/\/([^\/]*).*/;
var match = url.match(regex);
if(typeof match != “undefined” && null != match) {
host = match[1];
}
return host;
}
3、原生JavaScript清除空格
String.prototype.trim = function() {
var reExtraSpace = /^\s*(.*?)\s+$/;
return this.replace(reExtraSpace, “$1”)
}
4、原生JavaScript替換全部
String.prototype.replaceAll = function(s1, s2) {
return this.replace(new RegExp(s1, “gm”), s2)
}
5、原生JavaScript轉義html標籤
function HtmlEncode(text) {
return text.replace(/&/g, ‘&’).replace(/\”/g, ‘”‘).replace(/</g, ‘<‘).replace(/>/g, ‘>’)
}
6、原生JavaScript還原html標籤
function HtmlDecode(text) {
return text.replace(/&/g, ‘&’).replace(/”/g, ‘\”‘).replace(/</g, ‘<‘).replace(/>/g, ‘>’)
}
7、原生JavaScript時間日期格式轉換
Date.prototype.Format = function(formatStr) {
var str = formatStr;
var Week = [‘日’, ‘一’, ‘二’, ‘三’, ‘四’, ‘五’, ‘六’];
str = str.replace(/yyyy|YYYY/, this.getFullYear());
str = str.replace(/yy|YY/, (this.getYear() % 100) > 9 ? (this.getYear() % 100).toString() : ‘0’ + (this.getYear() % 100));
str = str.replace(/MM/, (this.getMonth() + 1) > 9 ? (this.getMonth() + 1).toString() : ‘0’ + (this.getMonth() + 1));
str = str.replace(/M/g, (this.getMonth() + 1));
str = str.replace(/w|W/g, Week[this.getDay()]);
str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : ‘0’ + this.getDate());
str = str.replace(/d|D/g, this.getDate());
str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : ‘0’ + this.getHours());
str = str.replace(/h|H/g, this.getHours());
str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : ‘0’ + this.getMinutes());
str = str.replace(/m/g, this.getMinutes());
str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : ‘0’ + this.getSeconds());
str = str.replace(/s|S/g, this.getSeconds());
return str
}
8、原生JavaScript判斷是否為數字類型
function isDigit(value) {
var patrn = /^[0-9]*$/;
if (patrn.exec(value) == null || value == “”) {
return false
} else {
return true
}
}
9、原生JavaScript設置cookie值
function setCookie(name, value, Hours) {
var d = new Date();
var offset = 8;
var utc = d.getTime() + (d.getTimezoneOffset() * 60000);
var nd = utc + (3600000 * offset);
var exp = new Date(nd);
exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000);
document.cookie = name + “=” + escape(value) + “;path=/;expires=” + exp.toGMTString() + “;domain=360doc.com;”
}
10、原生JavaScript獲取cookie值
function getCookie(name) {
var arr = document.cookie.match(new RegExp(“(^| )” + name + “=([^;]*)(;|$)”));
if (arr != null) return unescape(arr[2]);
return null
}
11、原生JavaScript加入我的最愛
function AddFavorite(sURL, sTitle) {
try {
window.external.addFavorite(sURL, sTitle)
} catch(e) {
try {
window.sidebar.addPanel(sTitle, sURL, “”)
} catch(e) {
alert(“加入收藏失敗，請使用Ctrl+D進行添加”)
}
}
}
12、原生JavaScript設為首頁
function setHomepage() {
if (document.all) {
document.body.style.behavior = ‘url(#default#homepage)’;
document.body.setHomePage(‘http://www.jq-school.com’)
} else if (window.sidebar) {
if (window.netscape) {
try {
netscape.security.PrivilegeManager.enablePrivilege(“UniversalXPConnect”)
} catch(e) {
alert(“該操作被流覽器拒絕，如果想啟用該功能，請在位址欄內輸入 about:config,然後將項 signed.applets.codebase_principal_support 值該為true”)
}
}
var prefs = Components.classes[‘@mozilla.org/preferences-service;1’].getService(Components.interfaces.nsIPrefBranch);
prefs.setCharPref(‘browser.startup.homepage’, ‘http://www.jq-school.com’)
}
}
13、原生JavaScript判斷IE6
var ua = navigator.userAgent.toLowerCase();
var isIE6 = ua.indexOf(“msie 6”) > -1;
if (isIE6) {
try {
document.execCommand(“BackgroundImageCache”, false, true)
} catch(e) {}
}
14、原生JavaScript載入樣式檔
function LoadStyle(url) {
try {
document.createStyleSheet(url)
} catch(e) {
var cssLink = document.createElement(‘link’);
cssLink.rel = ‘stylesheet’;
cssLink.type = ‘text/css’;
cssLink.href = url;
var head = document.getElementsByTagName(‘head’)[0];
head.appendChild(cssLink)
}
}
15、原生JavaScript返回腳本內容
function evalscript(s) {
if(s.indexOf(‘<script’) == -1) return s;
var p = /<script[^\>]*?>([^\x00]*?)<\/script>/ig;
var arr = [];
while(arr = p.exec(s)) {
var p1 = /<script[^\>]*?src=\”([^\>]*?)\”[^\>]*?(reload=\”1\”)?(?:charset=\”([\w\-]+?)\”)?><\/script>/i;
var arr1 = [];
arr1 = p1.exec(arr[0]);
if(arr1) {
appendscript(arr1[1], ”, arr1[2], arr1[3]);
} else {
p1 = /<script(.*?)>([^\x00]+?)<\/script>/i;
arr1 = p1.exec(arr[0]);
appendscript(”, arr1[2], arr1[1].indexOf(‘reload=’) != -1);
}
}
return s;
}
16、原生JavaScript清除腳本內容
function stripscript(s) {
return s.replace(/<script.*?>.*?<\/script>/ig, ”);
}
17、原生JavaScript動態載入指令檔
function appendscript(src, text, reload, charset) {
var id = hash(src + text);
if(!reload && in_array(id, evalscripts)) return;
if(reload && $(id)) {
$(id).parentNode.removeChild($(id));
}
evalscripts.push(id);
var scriptNode = document.createElement(“script”);
scriptNode.type = “text/javascript”;
scriptNode.id = id;
scriptNode.charset = charset ? charset : (BROWSER.firefox ? document.characterSet : document.charset);
try {
if(src) {
scriptNode.src = src;
scriptNode.onloadDone = false;
scriptNode.onload = function () {
scriptNode.onloadDone = true;
JSLOADED[src] = 1;
};
scriptNode.onreadystatechange = function () {
if((scriptNode.readyState == ‘loaded’ || scriptNode.readyState == ‘complete’) && !scriptNode.onloadDone) {
scriptNode.onloadDone = true;
JSLOADED[src] = 1;
}
};
} else if(text){
scriptNode.text = text;
}
document.getElementsByTagName(‘head’)[0].appendChild(scriptNode);
} catch(e) {}
}
18、原生JavaScript返回按ID檢索的元素物件
function $(id) {
return !id ? null : document.getElementById(id);
}
19、原生JavaScript返回流覽器版本內容
function browserVersion(types) {
var other = 1;
for(i in types) {
var v = types<i> ? types<i> : i;
if(USERAGENT.indexOf(v) != -1) {
var re = new RegExp(v + ‘(\\/|\\s)([\\d\\.]+)’, ‘ig’);
var matches = re.exec(USERAGENT);
var ver = matches != null ? matches[2] : 0;
other = ver !== 0 && v != ‘mozilla’ ? 0 : other;
}else {
var ver = 0;
}
eval(‘BROWSER.’ + i + ‘= ver’);
}
BROWSER.other = other;
}
20、原生JavaScript元素顯示的通用方法
function $(id) {
return !id ? null : document.getElementById(id);
}
function display(id) {
var obj = $(id);
if(obj.style.visibility) {
obj.style.visibility = obj.style.visibility == ‘visible’ ? ‘hidden’ : ‘visible’;
} else {
obj.style.display = obj.style.display == ” ? ‘none’ : ”;
}
}
21、原生JavaScript中有insertBefore方法,可惜卻沒有insertAfter方法?用如下函數實現
function insertAfter(newChild,refChild){
var parElem=refChild.parentNode;
if(parElem.lastChild==refChild){
refChild.appendChild(newChild);
}else{
parElem.insertBefore(newChild,refChild.nextSibling);
}
}
22、原生JavaScript中相容流覽器綁定元素事件
function addEventSamp(obj,evt,fn){
if (obj.addEventListener) {
obj.addEventListener(evt, fn, false);
}else if(obj.attachEvent){
obj.attachEvent(‘on’+evt,fn);
}
}
23、原生JavaScript游標停在文字的後面，文字方塊獲得焦點時調用
function focusLast(){
var e = event.srcElement;
var r =e.createTextRange();
r.moveStart(‘character’,e.value.length);
r.collapse(true);
r.select();
}
24、原生JavaScript檢驗URL連結是否有效
function getUrlState(URL){
var xmlhttp = new ActiveXObject(“microsoft.xmlhttp”);
xmlhttp.Open(“GET”,URL, false);
try{
xmlhttp.Send();
}catch(e){
}finally{
var result = xmlhttp.responseText;
if(result){
if(xmlhttp.Status==200){
return(true);
}else{
return(false);
}
}else{
return(false);
}
}
}
25、原生JavaScript格式化CSS樣式代碼
function formatCss(s){//格式化代碼
s = s.replace(/\s*([\{\}\:\;\,])\s*/g, “$1”);
s = s.replace(/;\s*;/g, “;”); //清除連續分號
s = s.replace(/\,[\s\.\#\d]*{/g, “{“);
s = s.replace(/([^\s])\{([^\s])/g, “$1 {\n\t$2”);
s = s.replace(/([^\s])\}([^\n]*)/g, “$1\n}\n$2”);
s = s.replace(/([^\s]);([^\s\}])/g, “$1;\n\t$2”);
return s;
}
26、原生JavaScript壓縮CSS樣式代碼
function yasuoCss (s) {//壓縮代碼
s = s.replace(/\/\*(.|\n)*?\*\//g, “”); //刪除注釋
s = s.replace(/\s*([\{\}\:\;\,])\s*/g, “$1”);
s = s.replace(/\,[\s\.\#\d]*\{/g, “{“); //容錯處理
s = s.replace(/;\s*;/g, “;”); //清除連續分號
s = s.match(/^\s*(\S+(\s+\S+)*)\s*$/); //去掉首尾空白
return (s == null) ? “” : s[1];
}
27、原生JavaScript獲取當前路徑
var currentPageUrl = “”;
if (typeof this.href === “undefined”) {
currentPageUrl = document.location.toString().toLowerCase();
}
else {
currentPageUrl = this.href.toString().toLowerCase();
}
28、原生JavaScriptIP轉成整型
function _ip2int(ip){
var num = 0;
ip = ip.split(“.”);
num = Number(ip[0]) * 256 * 256 * 256 + Number(ip[1]) * 256 * 256 + Number(ip[2]) * 256 + Number(ip[3]);
num = num >>> 0;
return num;
}
29、原生JavaScript整型解析為IP地址
function _int2iP(num){
var str;
var tt = new Array();
tt[0] = (num >>> 24) >>> 0;
tt[1] = ((num << 8) >>> 24) >>> 0;
tt[2] = (num << 16) >>> 24;
tt[3] = (num << 24) >>> 24;
str = String(tt[0]) + “.” + String(tt[1]) + “.” + String(tt[2]) + “.” + String(tt[3]);
return str;
}
30、原生JavaScript實現checkbox全選與全不選
function checkAll() {
var selectall = document.getElementById(“selectall”);
var allbox = document.getElementsByName(“allbox”);
if (selectall.checked) {
for (var i = 0; i < allbox.length; i++) {
allbox.checked = true;
}
} else {
for (var i = 0; i < allbox.length; i++) {
allbox.checked = false;
}
}
}
31、原生] JavaScript判斷是否移動設備
function isMobile(){
if (typeof this._isMobile === ‘boolean’){
return this._isMobile;
}
var screenWidth = this.getScreenWidth();
var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;
var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === “new”);
if(!fixViewPortsExperiment){
if(!this.isAppleMobileDevice()){
screenWidth = screenWidth/window.devicePixelRatio;
}
}
var isMobileScreenSize = screenWidth < 600;
var isMobileUserAgent = false;
this._isMobile = isMobileScreenSize && this.isTouchScreen();
return this._isMobile;
}
32、原生JavaScript判斷是否移動設備訪問
function isAppleMobileDevice(){
return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));
}
33、原生JavaScript判斷是否蘋果移動設備訪問
function isAppleMobileDevice(){
return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));
}
34、原生JavaScript判斷是否安卓移動設備訪問
function isAndroidMobileDevice(){
return (/android/i.test(navigator.userAgent.toLowerCase()));
}
35、原生JavaScript判斷是否Touch螢幕
function isTouchScreen(){
return ((‘ontouchstart’ in window) || window.DocumentTouch && document instanceof DocumentTouch);
}
36、原生JavaScript判斷是否在安卓上的穀歌流覽器
function isNewChromeOnAndroid(){
if(this.isAndroidMobileDevice()){
var userAgent = navigator.userAgent.toLowerCase();
if((/chrome/i.test(userAgent))){
var parts = userAgent.split(‘chrome/’);
var fullVersionString = parts[1].split(” “)[0];
var versionString = fullVersionString.split(‘.’)[0];
var version = parseInt(versionString);
if(version >= 27){
return true;
}
}
}
return false;
}
37、原生JavaScript判斷是否打開視窗
function isViewportOpen() {
return !!document.getElementById(‘wixMobileViewport’);
}
38、原生JavaScript獲取移動設備初始化大小
function getInitZoom(){
if(!this._initZoom){
var screenWidth = Math.min(screen.height, screen.width);
if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){
screenWidth = screenWidth/window.devicePixelRatio;
}
this._initZoom = screenWidth /document.body.offsetWidth;
}
return this._initZoom;
}
39、原生JavaScript獲取移動設備最大化大小
function getZoom(){
var screenWidth = (Math.abs(window.orientation) === 90) ? Math.max(screen.height, screen.width) : Math.min(screen.height, screen.width);
if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){
screenWidth = screenWidth/window.devicePixelRatio;
}
var FixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;
var FixViewPortsExperimentRunning = FixViewPortsExperiment && (FixViewPortsExperiment === “New” || FixViewPortsExperiment === “new”);
if(FixViewPortsExperimentRunning){
return screenWidth / window.innerWidth;
}else{
return screenWidth / document.body.offsetWidth;
}
}
40、原生JavaScript獲取移動設備螢幕寬度
function getScreenWidth(){
var smallerSide = Math.min(screen.width, screen.height);
var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;
var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === “new”);
if(fixViewPortsExperiment){
if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){
smallerSide = smallerSide/window.devicePixelRatio;
}
}
return smallerSide;
}
41、原生 JavaScript完美判斷是否為網址
function IsURL(strUrl) {
var regular = /^\b(((https?|ftp):\/\/)?[-a-z0-9]+(\.[-a-z0-9]+)*\.(?:com|edu|gov|int|mil|net|org|biz|info|name|museum|asia|coop|aero|[a-z][a-z]|((25[0-5])|(2[0-4]\d)|(1\d\d)|([1-9]\d)|\d))\b(\/[-a-z0-9_:\@&?=+,.!\/~%\$]*)?)$/i
if (regular.test(strUrl)) {
return true;
}
else {
return false;
}
}
42、原生JavaScript根據樣式名稱檢索元素物件
function getElementsByClassName(name) {
var tags = document.getElementsByTagName(‘*’) || document.all;
var els = [];
for (var i = 0; i < tags.length; i++) {
if (tags.className) {
var cs = tags.className.split(‘ ‘);
for (var j = 0; j < cs.length; j++) {
if (name == cs[j]) {
els.push(tags);
break
}
}
}
}
return els
}
43、原生JavaScript判斷是否以某個字串開頭
String.prototype.startWith = function (s) {
return this.indexOf(s) == 0
}
44、原生JavaScript判斷是否以某個字串結束
String.prototype.endWith = function (s) {
var d = this.length – s.length;
return (d >= 0 && this.lastIndexOf(s) == d)
}
45、原生JavaScript返回IE流覽器的版本號
function getIE(){
if (window.ActiveXObject){
var v = navigator.userAgent.match(/MSIE ([^;]+)/)[1];
return parseFloat(v.substring(0, v.indexOf(“.”)))
}
return false
}
46、原生JavaScript獲取頁面高度
function getPageHeight(){
var g = document, a = g.body, f = g.documentElement, d = g.compatMode == “BackCompat”
? a
: g.documentElement;
return Math.max(f.scrollHeight, a.scrollHeight, d.clientHeight);
}
47、原生JavaScript獲取頁面scrollLeft
function getPageScrollLeft(){
var a = document;
return a.documentElement.scrollLeft || a.body.scrollLeft;
}
48、原生JavaScript獲取頁面可視寬度
function getPageViewWidth(){
var d = document, a = d.compatMode == “BackCompat”
? d.body
: d.documentElement;
return a.clientWidth;
}
49、原生JavaScript獲取頁面寬度
function getPageWidth(){
var g = document, a = g.body, f = g.documentElement, d = g.compatMode == “BackCompat”
? a
: g.documentElement;
return Math.max(f.scrollWidth, a.scrollWidth, d.clientWidth);
}
50、原生JavaScript獲取頁面scrollTop
function getPageScrollTop(){
var a = document;
return a.documentElement.scrollTop || a.body.scrollTop;
}
51、原生JavaScript獲取頁面可視高度
function getPageViewHeight() {
var d = document, a = d.compatMode == “BackCompat”
? d.body
: d.documentElement;
return a.clientHeight;
}
52、原生JavaScript跨流覽器添加事件
function addEvt(oTarget,sEvtType,fnHandle){
if(!oTarget){return;}
if(oTarget.addEventListener){
oTarget.addEventListener(sEvtType,fnHandle,false);
}else if(oTarget.attachEvent){
oTarget.attachEvent(“on” + sEvtType,fnHandle);
}else{
oTarget[“on” + sEvtType] = fnHandle;
}
}
53、原生JavaScript跨流覽器刪除事件
function delEvt(oTarget,sEvtType,fnHandle){
if(!oTarget){return;}
if(oTarget.addEventListener){
oTarget.addEventListener(sEvtType,fnHandle,false);
}else if(oTarget.attachEvent){
oTarget.attachEvent(“on” + sEvtType,fnHandle);
}else{
oTarget[“on” + sEvtType] = fnHandle;
}
}
54、原生JavaScript去掉url首碼
function removeUrlPrefix(a){
a=a.replace(/：/g,”:”).replace(/．/g,”.”).replace(/／/g,”/”);
while(trim(a).toLowerCase().indexOf(“http://”)==0){
a=trim(a.replace(/http:\/\//i,””));
}
return a;
}
55、原生JavaScript亂數時間戳記
function uniqueId(){
var a=Math.random,b=parseInt;
return Number(new Date()).toString()+b(10*a())+b(10*a())+b(10*a());
}
56、原生JavaScript全形半形轉換,iCase: 0全到半，1半到全，其他不轉化
function chgCase(sStr,iCase){
if(typeof sStr != “string” || sStr.length <= 0 || !(iCase === 0 || iCase == 1)){
return sStr;
}
var i,oRs=[],iCode;
if(iCase){/*半->全*/
for(i=0; i<sStr.length;i+=1){
iCode = sStr.charCodeAt(i);
if(iCode == 32){
iCode = 12288;
}else if(iCode < 127){
iCode += 65248;
}
oRs.push(String.fromCharCode(iCode));
}
}else{/*全->半*/
for(i=0; i<sStr.length;i+=1){
iCode = sStr.charCodeAt(i);
if(iCode == 12288){
iCode = 32;
}else if(iCode > 65280 && iCode < 65375){
iCode -= 65248;
}
oRs.push(String.fromCharCode(iCode));
}
}
return oRs.join(“”);
}
57、原生JavaScript確認是否鍵盤有效輸入值
function checkKey(iKey){
if(iKey == 32 || iKey == 229){return true;}/*空格和異常*/
if(iKey>47 && iKey < 58){return true;}/*數字*/
if(iKey>64 && iKey < 91){return true;}/*字母*/
if(iKey>95 && iKey < 108){return true;}/*數位鍵盤1*/
if(iKey>108 && iKey < 112){return true;}/*數位鍵盤2*/
if(iKey>185 && iKey < 193){return true;}/*符號1*/
if(iKey>218 && iKey < 223){return true;}/*符號2*/
return false;
}
58、原生JavaScript獲取網頁被卷去的位置
function getScrollXY() {
return document.body.scrollTop ? {
x: document.body.scrollLeft,
y: document.body.scrollTop
}: {
x: document.documentElement.scrollLeft,
y: document.documentElement.scrollTop
}
}
59、原生JavaScript另一種正則日期格式化函數+調用方法
Date.prototype.format = function(format){ //author: meizz
var o = {
“M+” : this.getMonth()+1, //month
“d+” : this.getDate(), //day
“h+” : this.getHours(), //hour
“m+” : this.getMinutes(), //minute
“s+” : this.getSeconds(), //second
“q+” : Math.floor((this.getMonth()+3)/3), //quarter
“S” : this.getMilliseconds() //millisecond
}
if(/(y+)/.test(format)) format=format.replace(RegExp.$1,
(this.getFullYear()+””).substr(4 – RegExp.$1.length));
for(var k in o)if(new RegExp(“(“+ k +”)”).test(format))
format = format.replace(RegExp.$1,
RegExp.$1.length==1 ? o[k] :
(“00″+ o[k]).substr((“”+ o[k]).length));
return format;
}
alert(new Date().format(“yyyy-MM-dd hh:mm:ss”));
60、原生JavaScript時間個性化輸出功能
/*
1、< 60s, 顯示為“剛剛”
2、>= 1min && < 60 min, 顯示與當前時間差“XX分鐘前”
3、>= 60min && < 1day, 顯示與當前時間差“今天 XX:XX”
4、>= 1day && < 1year, 顯示日期“XX月XX日 XX:XX”
5、>= 1year, 顯示具體日期“XXXX年XX月XX日 XX:XX”
*/
function timeFormat(time){
var date = new Date(time)
, curDate = new Date()
, year = date.getFullYear()
, month = date.getMonth() + 1
, day = date.getDate()
, hour = date.getHours()
, minute = date.getMinutes()
, curYear = curDate.getFullYear()
, curHour = curDate.getHours()
, timeStr;
if(year < curYear){
timeStr = year +’年’+ month +’月’+ day +’日 ‘+ hour +’:’+ minute;
}else{
var pastTime = curDate – date
, pastH = pastTime/3600000;
if(pastH > curHour){
timeStr = month +’月’+ day +’日 ‘+ hour +’:’+ minute;
}else if(pastH >= 1){
timeStr = ‘今天 ‘ + hour +’:’+ minute +’分’;
}else{
var pastM = curDate.getMinutes() – minute;
if(pastM > 1){
timeStr = pastM +’分鐘前’;
}else{
timeStr = ‘剛剛’;
}
}
}
return timeStr;
}
61、原生JavaScript解決offsetX相容性問題
// 針對火狐不支持offsetX/Y
function getOffset(e){
var target = e.target, // 當前觸發的目標物件
eventCoord,
pageCoord,
offsetCoord;
// 計算當前觸發元素到文檔的距離
pageCoord = getPageCoord(target);
// 計算游標到文檔的距離
eventCoord = {
X : window.pageXOffset + e.clientX,
Y : window.pageYOffset + e.clientY
};
// 相減獲取游標到第一個定位的父元素的座標
offsetCoord = {
X : eventCoord.X – pageCoord.X,
Y : eventCoord.Y – pageCoord.Y
};
return offsetCoord;
}
function getPageCoord(element){
var coord = { X : 0, Y : 0 };
// 計算從當前觸發元素到根節點為止，
// 各級 offsetParent 元素的 offsetLeft 或 offsetTop 值之和
while (element){
coord.X += element.offsetLeft;
coord.Y += element.offsetTop;
element = element.offsetParent;
}
return coord;
}
62、原生JavaScript常用的規則運算式
//正整數
/^[0-9]*[1-9][0-9]*$/;
//負整數
/^-[0-9]*[1-9][0-9]*$/;
//正浮點數
/^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$/;
//負浮點數
/^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/;
//浮點數
/^(-?\d+)(\.\d+)?$/;
//email地址
/^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/;
//url地址
/^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$/;
//年/月/日（年-月-日、年.月.日）
/^(19|20)\d\d[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])$/;
//匹配中文字元
/[\u4e00-\u9fa5]/;
//匹配帳號是否合法(字母開頭，允許5-10位元組，允許字母數位底線)
/^[a-zA-Z][a-zA-Z0-9_]{4,9}$/;
//匹配空白行的規則運算式
/\n\s*\r/;
//匹配中國郵遞區號
/[1-9]\d{5}(?!\d)/;
//匹配身份證
/\d{15}|\d{18}/;
//匹配國內電話號碼
/(\d{3}-|\d{4}-)?(\d{8}|\d{7})?/;
//匹配IP地址
/((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)/;
//匹配首尾空白字元的規則運算式
/^\s*|\s*$/;
//匹配HTML標記的規則運算式
< (\S*?)[^>]*>.*?|< .*? />;
63、原生JavaScript實現返回頂部的通用方法
function backTop(btnId) {
var btn = document.getElementById(btnId);
var d = document.documentElement;
var b = document.body;
window.onscroll = set;
btn.style.display = “none”;
btn.onclick = function() {
btn.style.display = “none”;
window.onscroll = null;
this.timer = setInterval(function() {
d.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);
b.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);
if ((d.scrollTop + b.scrollTop) == 0) clearInterval(btn.timer, window.onscroll = set);
},
10);
};
function set() {
btn.style.display = (d.scrollTop + b.scrollTop > 100) ? ‘block’: “none”
}
};
backTop(‘goTop’);
64、原生JavaScript獲得URL中GET參數值
// 用法：如果地址是 test.htm?t1=1&t2=2&t3=3, 那麼能取得：GET[“t1”], GET[“t2”], GET[“t3”]
function get_get(){
querystr = window.location.href.split(“?”)
if(querystr[1]){
GETs = querystr[1].split(“&”)
GET =new Array()
for(i=0;i<GETs.length;i++){
tmp_arr = GETs.split(“=”)
key=tmp_arr[0]
GET[key] = tmp_arr[1]
}
}
return querystr[1];
}
65、原生JavaScript實現全選通用方法
function checkall(form, prefix, checkall) {
var checkall = checkall ? checkall : ‘chkall’;
for(var i = 0; i < form.elements.length; i++) {
var e = form.elements;
if(e.type==”checkbox”){
e.checked = form.elements[checkall].checked;
}
}
}
66、原生JavaScript實現全部取消選擇通用方法
function uncheckAll(form) {
for (var i=0;i<form.elements.length;i++){
var e = form.elements;
if (e.name != ‘chkall’)
e.checked=!e.checked;
}
}
67、原生JavaScript實現打開一個表單通用方法
function openWindow(url,windowName,width,height){
var x = parseInt(screen.width / 2.0) – (width / 2.0);
var y = parseInt(screen.height / 2.0) – (height / 2.0);
var isMSIE= (navigator.appName == “Microsoft Internet Explorer”);
if (isMSIE) {
var p = “resizable=1,location=no,scrollbars=no,width=”;
p = p+width;
p = p+”,height=”;
p = p+height;
p = p+”,left=”;
p = p+x;
p = p+”,top=”;
p = p+y;
retval = window.open(url, windowName, p);
} else {
var win = window.open(url, “ZyiisPopup”, “top=” + y + “,left=” + x + “,scrollbars=” + scrollbars + “,dialog=yes,modal=yes,width=” + width + “,height=” + height + “,resizable=no” );
eval(“try { win.resizeTo(width, height); } catch(e) { }”);
win.focus();
}
}
68、原生JavaScript判斷是否為用戶端設備
function client(o){
var b = navigator.userAgent.toLowerCase();
var t = false;
if (o == ‘isOP’){
t = b.indexOf(‘opera’) > -1;
}
if (o == ‘isIE’){
t = b.indexOf(‘msie’) > -1;
}
if (o == ‘isFF’){
t = b.indexOf(‘firefox’) > -1;
}
return t;
}
69、原生JavaScript獲取選項按鈕的值
function get_radio_value(field){
if(field&&field.length){
for(var i=0;i<field.length;i++){
if(field.checked){
return field.value;
}
}
}else {
return ;
}
}
70、原生JavaScript獲取核取方塊的值
function get_checkbox_value(field){
if(field&&field.length){
for(var i=0;i<field.length;i++){
if(field.checked && !field.disabled){
return field.value;
}
}
}else {
return;
}
}
71、原生JavaScript判斷是否為郵箱
function isEmail(str){
var re=/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/;
if (re.test(str) != true) {
return false;
}else{
return true;
}
}
72、原生JavaScript判斷是否有清單中的危險字元
function isValidReg(chars){
var re=/<|>|\[|\]|\{|\}|『|』|※|○|●|◎|§|△|▲|☆|★|◇|◆|□|▼|㊣|﹋|⊕|⊙|〒|ㄅ|ㄆ|ㄇ|ㄈ|ㄉ|ㄊ|ㄋ|ㄌ|ㄍ|ㄎ|ㄏ|ㄐ|ㄑ|ㄒ|ㄓ|ㄔ|ㄕ|ㄖ|ㄗ|ㄘ|ㄙ|ㄚ|ㄛ|ㄜ|ㄝ|ㄞ|ㄟ|ㄢ|ㄣ|ㄤ|ㄥ|ㄦ|ㄧ|ㄨ|ㄩ|■|▄|▆|\*|@|#|\^|\\/;
if (re.test( chars) == true) {
return false;
}else{
return true;
}
}
73、原生JavaScript判斷字串是否大於規定的長度
function isValidLength(chars, len) {
if (chars.length < len) {
return false;
}
return true;
}
74、原生JavaScript判斷字串是為網址不區分大小寫
function isValidURL( chars ) {
var re=/^([hH][tT]{2}[pP]:\/\/|[hH][tT]{2}[pP][sS]:\/\/)(\S+\.\S+)$/;
if (!isNULL(chars)) {
chars = jsTrim(chars);
if (chars.match(re) == null)
return false;
else
return true;
}
return false;
}
75、原生JavaScript判斷字串是否為小數
function isValidDecimal( chars ) {
var re=/^\d*\.?\d{1,2}$/;
if (chars.match(re) == null)
return false;
else
return true;
}
76、原生JavaScript判斷字串是否為整數
function isNumber( chars ) {
var re=/^\d*$/;
if (chars.match(re) == null)
return false;
else
return true;
}
77、原生JavaScript判斷字串是否為浮點數
function isFloat( str ) {
for(i=0;i<str.length;i++) {
if ((str.charAt(i)<“0″ || str.charAt(i)>”9”)&& str.charAt(i) != ‘.’){
return false;
}
}
return true;
}
78、原生JavaScript判斷字元是否為A-Za-z英文字母
function isLetters( str ){
var re=/^[A-Za-z]+$/;
if (str.match(re) == null)
return false;
else
return true;
}
79、原生JavaScript判斷字串是否郵遞區號
function isValidPost( chars ) {
var re=/^\d{6}$/;
if (chars.match(re) == null)
return false;
else
return true;
}
80、原生JavaScript判斷字元是否空NULL
function isNULL( chars ) {
if (chars == null)
return true;
if (jsTrim(chars).length==0)
return true;
return false;
}
81、原生JavaScript用規則運算式提取頁面代碼中所有網址
var aa = document.documentElement.outerHTML.match(/(url\(|src=|href=)[\”\’]*([^\”\’\(\)\<\>\[\] ]+)[\”\’\)]*|(http:\/\/[\w\-\.]+[^\”\’\(\)\<\>\[\] ]+)/ig).join(“\r\n”).replace(/^(src=|href=|url\()[\”\’]*|[\”\’\>\) ]*$/igm,””);
alert(aa)
82、原生JavaScript用規則運算式清除相同的陣列(低效率)
Array.prototype.unique=function(){
return this.reverse().join(“,”).match(/([^,]+)(?!.*\1)/ig).reverse();
};
83、原生JavaScript用規則運算式清除相同的陣列(高效率)
String.prototype.unique=function(){
var x=this.split(/[\r\n]+/);
var y=”;
for(var i=0;i<x.length;i++){
if(!new RegExp(“^”+x.replace(/([^\w])/ig,”\\$1″)+”[ DISCUZ_CODE_2 ]quot;,”igm”).test(y)){
y+=x+”\r\n”
}
}
return y
};
84、原生JavaScript用規則運算式按字母排序，對每行進行陣列排序
function SetSort(){
var text=K1.value.split(/[\r\n]/).sort().join(“\r\n”);//順序
var test=K1.value.split(/[\r\n]/).sort().reverse().join(“\r\n”);//反序
K1.value=K1.value!=text?text:test;
}
85、原生JavaScript字串反序
function IsReverse(text){
return text.split(”).reverse().join(”);
}
86、原生JavaScript用規則運算式清除html代碼中的腳本
function clear_script(){
K1.value=K1.value.replace(/<script.*?>[\s\S]*?<\/script>|\s+on[a-zA-Z]{3,16}\s?=\s?”[\s\S]*?”|\s+on[a-zA-Z]{3,16}\s?=\s?'[\s\S]*?’|\s+on[a-zA-Z]{3,16}\s?=[^ >]+/ig,””);
}
87、原生JavaScript動態執行JavaScript腳本
function javascript(){
try{
eval(K1.value);
}catch(e){
alert(e.message);
}
}
88、原生JavaScript動態執行VBScript腳本
function vbscript(){
try{
var script=document.getElementById(“K1″).value;
if(script.trim()==””)return;
window.execScript(‘On Error Resume Next \n’+script+’\n If Err.Number<>0 Then \n MsgBox “請輸入正確的VBScript腳本!”,48,”腳本錯誤!” \n End If’,”vbscript”)
}catch(e){
alert(e.message);
}
}
89、原生JavaScript實現金額大寫轉換函數
function transform(tranvalue) {
try {
var i = 1;
var dw2 = new Array(“”, “萬”, “億”); //大單位
var dw1 = new Array(“拾”, “佰”, “仟”); //小單位
var dw = new Array(“零”, “壹”, “貳”, “三”, “肆”, “伍”, “陸”, “柒”, “捌”, “玖”); //整數部分用
//以下是小寫轉換成大寫顯示在合計大寫的文字方塊中
//分離整數與小數
var source = splits(tranvalue);
var num = source[0];
var dig = source[1];
//轉換整數部分
var k1 = 0; //計小單位
var k2 = 0; //計大單位
var sum = 0;
var str = “”;
var len = source[0].length; //整數的長度
for (i = 1; i <= len; i++) {
var n = source[0].charAt(len – i); //取得某個位元數上的數字
var bn = 0;
if (len – i – 1 >= 0) {
bn = source[0].charAt(len – i – 1); //取得某個位元數前一位元上的數字
}
sum = sum + Number(n);
if (sum != 0) {
str = dw[Number(n)].concat(str); //取得該數位對應的大寫數位，並插入到str字串的前面
if (n == ‘0’) sum = 0;
}
if (len – i – 1 >= 0) { //在數字範圍內
if (k1 != 3) { //加小單位
if (bn != 0) {
str = dw1[k1].concat(str);
}
k1++;
} else { //不加小單位，加大單位
k1 = 0;
var temp = str.charAt(0);
if (temp == “萬” || temp == “億”) //若大單位前沒有數位則舍去大單位
str = str.substr(1, str.length – 1);
str = dw2[k2].concat(str);
sum = 0;
}
}
if (k1 == 3) //小單位到千則大單位進一
{
k2++;
}
}
//轉換小數部分
var strdig = “”;
if (dig != “”) {
var n = dig.charAt(0);
if (n != 0) {
strdig += dw[Number(n)] + “角”; //加數字
}
var n = dig.charAt(1);
if (n != 0) {
strdig += dw[Number(n)] + “分”; //加數字
}
}
str += “元” + strdig;
} catch(e) {
return “0元”;
}
return str;
}
//拆分整數與小數
function splits(tranvalue) {
var value = new Array(”, ”);
temp = tranvalue.split(“.”);
for (var i = 0; i < temp.length; i++) {
value = temp;
}
return value;
}
90、原生JavaScript常用的規則運算式大收集
匹配中文字元的規則運算式： [\u4e00-\u9fa5]
匹配雙位元組字元（包括漢字在內）：[^\x00-\xff]
匹配空行的規則運算式：\n[\s| ]*\r
匹配 HTML 標記的規則運算式：<(.*)>.*<\/\1>|<(.*) \/>
匹配首尾空格的規則運算式：(^\s*)|(\s*$)
匹配 IP 地址的規則運算式：/(\d+)\.(\d+)\.(\d+)\.(\d+)/g
匹配 Email 地址的規則運算式：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
匹配網址 URL 的規則運算式：http://(/[\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?
sql 語句：^(select|drop|delete|create|update|insert).*[ DISCUZ_CODE_39 ]nbsp;
非負整數：^\d+[ DISCUZ_CODE_39 ]nbsp;
正整數：^[0-9]*[1-9][0-9]*[ DISCUZ_CODE_39 ]nbsp;
非正整數：^((-\d+)|(0+))[ DISCUZ_CODE_39 ]nbsp;
負整數：^-[0-9]*[1-9][0-9]*[ DISCUZ_CODE_39 ]nbsp;
整數：^-?\d+[ DISCUZ_CODE_39 ]nbsp;
非負浮點數：^\d+(\.\d+)?[ DISCUZ_CODE_39 ]nbsp;
正浮點數：^((0-9)+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))[ DISCUZ_CODE_39 ]nbsp;
非正浮點數：^((-\d+\.\d+)?)|(0+(\.0+)?))[ DISCUZ_CODE_39 ]nbsp;
英文字串：^[A-Za-z]+[ DISCUZ_CODE_39 ]nbsp;
英文大寫串：^[A-Z]+[ DISCUZ_CODE_39 ]nbsp;
英文小寫串：^[a-z]+[ DISCUZ_CODE_39 ]nbsp;
英文字元數位串：^[A-Za-z0-9]+[ DISCUZ_CODE_39 ]nbsp;
英數字加底線串：^\w+[ DISCUZ_CODE_39 ]nbsp;
E-mail地址：^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+[ DISCUZ_CODE_39 ]nbsp;
URL：^[a-zA-Z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\s*)?$ 或：^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\’:+!]*([^<>\”\”])*[ DISCUZ_CODE_39 ]nbsp;
郵遞區號：^[1-9]\d{5}[ DISCUZ_CODE_39 ]nbsp;
電話號碼：^((\(\d{2,3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}(\-\d{1,4})?[ DISCUZ_CODE_39 ]nbsp;
手機號碼：^((\(\d{2,3}\))|(\d{3}\-))?13\d{9}[ DISCUZ_CODE_39 ]nbsp;
雙位元組字元（包括漢字在內）：^\x00-\xff
匹配首尾空格：(^\s*)|(\s*$)
匹配 HTML 標記：<(.*)>.*<\/\1>|<(.*) \/>
匹配空行：\n[\s| ]*\r
提取資訊中的網路連結：(h|H)(r|R)(e|E)(f|F) *= *(‘|”)?(\w|\\|\/|\.)+(‘|”| *|>)?
提取資訊中的郵寄地址：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
提取資訊中的圖片連結：(s|S)(r|R)(c|C) *= *(‘|”)?(\w|\\|\/|\.)+(‘|”| *|>)?
提取資訊中的 IP 位址：(\d+)\.(\d+)\.(\d+)\.(\d+)
提取資訊中的中國手機號碼：(86)*0*13\d{9}
提取資訊中的中國固定電話號碼：(\(\d{3,4}\)|\d{3,4}-|\s)?\d{8}
提取資訊中的中國電話號碼（包括移動和固定電話）：(\(\d{3,4}\)|\d{3,4}-|\s)?\d{7,14}
提取資訊中的中國郵遞區號：[1-9]{1}(\d+){5}
提取資訊中的浮點數（即小數）：(-?\d*)\.?\d+
提取資訊中的任何數位 ：(-?\d*)(\.\d+)?
IP：(\d+)\.(\d+)\.(\d+)\.(\d+)
電話區號：^0\d{2,3}$
騰訊 QQ 號：^[1-9]*[1-9][0-9]*[ DISCUZ_CODE_39 ]nbsp;
帳號（字母開頭，允許 5-16 位元組，允許字母數位底線）：^[a-zA-Z][a-zA-Z0-9_]{4,15}[ DISCUZ_CODE_39 ]nbsp;
中文、英文、數位及底線：^[\u4e00-\u9fa5_a-zA-Z0-9]+$
91、原生JavaScript實現表單改變事件resize的操作（相容所以的流覽器）
(function(){
var fn = function(){
var w = document.documentElement ? document.documentElement.clientWidth : document.body.clientWidth
,r = 1255
,b = Element.extend(document.body)
,classname = b.className;
if(w < r){
//當表單的寬度小於1255的時候執行相應的操作
}else{
//當表單的寬度大於1255的時候執行相應的操作
}
}
if(window.addEventListener){
window.addEventListener(‘resize’, function(){ fn(); });
}else if(window.attachEvent){
window.attachEvent(‘onresize’, function(){ fn(); });
}
fn();
})();
92、原生JavaScript用正則清除空格分左右
function ltrim(s){ return s.replace( /^(\s*| *)/, “”); }
function rtrim(s){ return s.replace( /(\s*| *)$/, “”); }
function trim(s){ return ltrim(rtrim(s));}
93、原生JavaScript判斷變數是否空值
/**
* 判斷變數是否空值
* undefined, null, ”, false, 0, [], {} 均返回true，否則返回false
*/
function empty(v){
switch (typeof v){
case ‘undefined’ : return true;
case ‘string’ : if(trim(v).length == 0) return true; break;
case ‘boolean’ : if(!v) return true; break;
case ‘number’ : if(0 === v) return true; break;
case ‘object’ :
if(null === v) return true;
if(undefined !== v.length && v.length==0) return true;
for(var k in v){return false;} return true;
break;
}
return false;
}
94、原生JavaScript實現base64解碼
function base64_decode(data){
var b64 = “ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=”;
var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,ac = 0,dec = “”,tmp_arr = [];
if (!data) { return data; }
data += ”;
do {
h1 = b64.indexOf(data.charAt(i++));
h2 = b64.indexOf(data.charAt(i++));
h3 = b64.indexOf(data.charAt(i++));
h4 = b64.indexOf(data.charAt(i++));
bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
o1 = bits >> 16 & 0xff;
o2 = bits >> 8 & 0xff;
o3 = bits & 0xff;
if (h3 == 64) {
tmp_arr[ac++] = String.fromCharCode(o1);
} else if (h4 == 64) {
tmp_arr[ac++] = String.fromCharCode(o1, o2);
} else {
tmp_arr[ac++] = String.fromCharCode(o1, o2, o3);
}
} while (i < data.length);
dec = tmp_arr.join(”);
dec = utf8_decode(dec);
return dec;
}
95、原生JavaScript實現utf8解碼
function utf8_decode(str_data){
var tmp_arr = [],i = 0,ac = 0,c1 = 0,c2 = 0,c3 = 0;str_data += ”;
while (i < str_data.length) {
c1 = str_data.charCodeAt(i);
if (c1 < 128) {
tmp_arr[ac++] = String.fromCharCode(c1);
i++;
} else if (c1 > 191 && c1 < 224) {
c2 = str_data.charCodeAt(i + 1);
tmp_arr[ac++] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63));
i += 2;
} else {
c2 = str_data.charCodeAt(i + 1);
c3 = str_data.charCodeAt(i + 2);
tmp_arr[ac++] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
i += 3;
}
}
return tmp_arr.join(”);
}
96、原生JavaScript獲取表單可見範圍的寬與高
function getViewSize(){
var de=document.documentElement;
var db=document.body;
var viewW=de.clientWidth==0 ? db.clientWidth : de.clientWidth;
var viewH=de.clientHeight==0 ? db.clientHeight : de.clientHeight;
return Array(viewW ,viewH);
}
96、原生JavaScript判斷IE版本號（既簡潔、又向後相容！）
var _IE = (function(){
var v = 3, div = document.createElement(‘div’), all = div.getElementsByTagName(‘i’);
while (
div.innerHTML = ‘<!–[if gt IE ‘ + (++v) + ‘]><i></i><![endif]–>’,
all[0]
);
return v > 4 ? v : false ;
}());
97、原生JavaScript獲取流覽器版本號
function browserVersion(types) {
var other = 1;
for (i in types) {
var v = types ? types : i;
if (USERAGENT.indexOf(v) != -1) {
var re = new RegExp(v + ‘(\\/|\\s|: )([\\d\\.]+)’, ‘ig’);
var matches = re.exec(USERAGENT);
var ver = matches != null ? matches[2] : 0;
other = ver !== 0 && v != ‘mozilla’ ? 0 : other;
} else {
var ver = 0;
}
eval(‘BROWSER.’ + i + ‘= ver’);
}
BROWSER.other = other;
}
98、原生JavaScript判斷滑鼠是否移出事件
function isMouseOut(e, handler) {
if (e.type !== ‘mouseout’) {
return false;
}
var reltg = e.relatedTarget ? e.relatedTarget : e.type === ‘mouseout’ ? e.toElement : e.fromElement;
while (reltg && reltg !== handler) {
reltg = reltg.parentNode;
}
return (reltg !== handler);
}
99、原生JavaScript半形轉換為全形函數
function ToDBC(str){
var result = ”;
for(var i=0; i < str.length; i++){
code = str.charCodeAt(i);
if(code >= 33 && code <= 126){
result += String.fromCharCode(str.charCodeAt(i) + 65248);
}else if (code == 32){
result += String.fromCharCode(str.charCodeAt(i) + 12288 – 32);
}else{
result += str.charAt(i);
}
}
return result;
}
100、原生JavaScript全形轉換為半形函數
function ToCDB(str){
var result = ”;
for(var i=0; i < str.length; i++){
code = str.charCodeAt(i);
if(code >= 65281 && code <= 65374){
result += String.fromCharCode(str.charCodeAt(i) – 65248);
}else if (code == 12288){
result += String.fromCharCode(str.charCodeAt(i) – 12288 + 32);
}else{
result += str.charAt(i);
}
}
return result;
}