本文中，收集了一些比較常用的Javascript函數(shù)，希望對學(xué)習(xí)JS的朋友們有所幫助。
1. 字符串長度截取
function cutstr(str, len) {
var temp,
icount = 0,
patrn = /[^\x00-\xff]/，
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. 替換全部
String.prototype.replaceAll = function(s1, s2) {
return this.replace(new RegExp(s1, "gm"), s2)
}
3. 清除空格
String.prototype.trim = function() {
var reExtraSpace = /^\s*(.*?)\s+$/;
return this.replace(reExtraSpace, "$1")
}
4. 清除左空格/右空格
function ltrim(s){ return s.replace( /^(\s*| *)/, ""); }
function rtrim(s){ return s.replace( /(\s*| *)$/, ""); }
5. 判斷是否以某個(gè)字符串開頭
String.prototype.startWith = function (s) {
return this.indexOf(s) == 0
}
6. 判斷是否以某個(gè)字符串結(jié)束
String.prototype.endWith = function (s) {
var d = this.length - s.length;
return (d >= 0 && this.lastIndexOf(s) == d)
}
7. 轉(zhuǎn)義html標(biāo)簽
function HtmlEncode(text) {
return text.replace(/&/g, '&').replace(/\"/g, '"').replace(/</g, '<').replace(/>/g, '>')
}
8. 時(shí)間日期格式轉(zhuǎn)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
}
9. 判斷是否為數(shù)字類型
function isDigit(value) {
var patrn = /^[0-9]*$/;
if (patrn.exec(value) == null || value == "") {
return false
} else {
return true
}
}
10. 設(shè)置cookie值
function setCookie(name, value, Hours) {
var d = new Date();
var offset = 8;
var utc = d.getTime() + (d.getTimezoneOffset() * 60000);
var nd = utc + (3600000 * offset);
var exp = new Date(nd);
exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000);
document.cookie = name + "=" + escape(value) + ";path=/;expires=" + exp.toGMTString() + ";domain=360doc.com;"
}
11. 獲取cookie值
function getCookie(name) {
var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
if (arr != null) return unescape(arr[2]);
return null
}
12. 加入收藏夾
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(jìn)行添加")
}
}
}
13. 設(shè)為首頁
function setHomepage() {
if (document.all) {
document.body.style.behavior = 'url(#default#homepage)';
document.body.setHomePage('http://w3cboy.com')
} else if (window.sidebar) {
if (window.netscape) {
try {
netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect")
} catch(e) {
alert("該操作被瀏覽器拒絕，如果想啟用該功能，請?jiān)诘刂窓趦?nèi)輸入 about:config,然后將項(xiàng) 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://w3cboy.com')
}
}
14. 加載樣式文件
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. 返回腳本內(nèi)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. 清除腳本內(nèi)容
function stripscript(s) {
return s.replace(/<script.*?>.*?<\/script>/ig, '');
}
17. 動(dòng)態(tài)加載腳本文件
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. 返回按ID檢索的元素對象
function $(id) {
return !id ? null : document.getElementById(id);
}
19. 跨瀏覽器綁定事件
function addEventSamp(obj,evt,fn){
if(!oTarget){return;}
if (obj.addEventListener) {
obj.addEventListener(evt, fn, false);
}else if(obj.attachEvent){
obj.attachEvent('on'+evt,fn);
}else{
oTarget["on" + sEvtType] = fn;
}
}
20. 跨瀏覽器刪除事件
function delEvt(obj,evt,fn){
if(!obj){return;}
if(obj.addEventListener){
obj.addEventListener(evt,fn,false);
}else if(oTarget.attachEvent){
obj.attachEvent("on" + evt,fn);
}else{
obj["on" + evt] = fn;
}
}
21. 為元素添加on方法
Element.prototype.on = Element.prototype.addEventListener;
NodeList.prototype.on = function (event, fn) {、
[]['forEach'].call(this, function (el) {
el.on(event, fn);
});
return this;
};
22. 為元素添加trigger方法
Element.prototype.trigger = function (type, data) {
var event = document.createEvent('HTMLEvents');
event.initEvent(type, true, true);
event.data = data || {};
event.eventName = type;
event.target = this;
this.dispatchEvent(event);
return this;
};
NodeList.prototype.trigger = function (event) {
[]['forEach'].call(this, function (el) {
el['trigger'](event);
});
return this;
};
23. 檢驗(yàn)URL鏈接是否有效
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);
}
}
}
24. 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(xù)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;
}
25. 壓縮CSS樣式代碼
function compressCss (s) {//壓縮代碼
s = s.replace(/\/\*(.|\n)*?\*\//g, ""); //刪除注釋
s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1");
s = s.replace(/\,[\s\.\#\d]*\{/g, "{"); //容錯(cuò)處理
s = s.replace(/;\s*;/g, ";"); //清除連續(xù)分號
s = s.match(/^\s*(\S+(\s+\S+)*)\s*$/); //去掉首尾空白
return (s == null) ? "" : s[1];
}
26. 獲取當(dāng)前路徑
var currentPageUrl = "";
if (typeof this.href === "undefined") {
currentPageUrl = document.location.toString().toLowerCase();
}else {
currentPageUrl = this.href.toString().toLowerCase();
}
27. 判斷是否移動(dòng)設(shè)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;
}
28. 判斷是否移動(dòng)設(shè)備訪問
function isMobileUserAgent(){
return (/iphone|ipod|android.*mobile|windows.*phone|blackberry.*mobile/i.test(window.navigator.userAgent.toLowerCase()));
}
29. 判斷是否蘋果移動(dòng)設(shè)備訪問
function isAppleMobileDevice(){
return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));
}
30. 判斷是否安卓移動(dòng)設(shè)備訪問
function isAndroidMobileDevice(){
return (/android/i.test(navigator.userAgent.toLowerCase()));
}
31. 判斷是否Touch屏幕
function isTouchScreen(){
return (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch);
}
32. 判斷是否打開視窗
function isViewportOpen() {
return !!document.getElementById('wixMobileViewport');
}
33. 獲取移動(dòng)設(shè)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;
}
34. 獲取移動(dòng)設(shè)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;
}
}
35. 獲取移動(dòng)設(shè)備屏幕寬度
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;
}
36. 完美判斷是否為網(wǎng)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;
}
}
37. getElementsByClassName
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
}
38. 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);
}
39. 獲取頁面可視寬度
function getPageViewWidth(){
var d = document, a = d.compatMode == "BackCompat"
? d.body
: d.documentElement;
return a.clientWidth;
}
40. 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);
}
41. 獲取頁面scrollTop
function getPageScrollTop(){
var a = document;
return a.documentElement.scrollTop || a.body.scrollTop;
}
42. 獲取頁面可視高度
function getPageViewHeight() {
var d = document, a = d.compatMode == "BackCompat"
? d.body
: d.documentElement;
return a.clientHeight;
}
43. 去掉url前綴
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;
}
44. 隨機(jī)數(shù)時(shí)間戳
function uniqueId(){
var a=Math.random,b=parseInt;
return Number(new Date()).toString()+b(10*a())+b(10*a())+b(10*a());
}
45. 全角半角轉(zhuǎn)換
//iCase: 0全到半，1半到全，其他不轉(zhuǎn)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("");
}
46. 確認(rèn)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(shù)字*/
if(iKey>64 && iKey < 91){return true;}/*字母*/
if(iKey>95 && iKey < 108){return true;}/*數(shù)字鍵盤1*/
if(iKey>108 && iKey < 112){return true;}/*數(shù)字鍵盤2*/
if(iKey>185 && iKey < 193){return true;}/*符號1*/
if(iKey>218 && iKey < 223){return true;}/*符號2*/
return false;
}
47. 獲取網(wǎng)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
}
}
48. 日期格式化函數(shù)+調(diào)用方法
Date.prototype.format = function(format){
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.$1.length==1 ? o[k] :("00"+ o[k]).substr((""+ o[k]).length));
}
return format;
}
alert(new Date().format("yyyy-MM-dd hh:mm:ss"));
49. 時(shí)間個(gè)性化輸出功能
/*
1、< 60s, 顯示為“剛剛”
2、>= 1min && < 60 min, 顯示與當(dāng)前時(shí)間差“XX分鐘前”
3、>= 60min && < 1day, 顯示與當(dāng)前時(shí)間差“今天 XX:XX”
4、>= 1day && < 1year, 顯示日期“XX月XX日 XX:XX”
5、>= 1year, 顯示具體日期“XXXX年XX月XX日 XX:XX”
*/
function timeFormat(time){
var date = new Date(time),
curDate = new Date(),
year = date.getFullYear(),
month = date.getMonth() + 10,
day = date.getDate(),
hour = date.getHours(),
minute = date.getMinutes(),
curYear = curDate.getFullYear(),
curHour = curDate.getHours(),
timeStr;
if(year < curYear){
timeStr = year +'年'+ month +'月'+ day +'日 '+ hour +':'+ minute;
}else{
var pastTime = curDate - date,
pastH = pastTime/3600000;
if(pastH > curHour){
timeStr = month +'月'+ day +'日 '+ hour +':'+ minute;
}else if(pastH >= 1){
timeStr = '今天 ' + hour +':'+ minute +'分';
}else{
var pastM = curDate.getMinutes() - minute;
if(pastM > 1){
timeStr = pastM +'分鐘前';
}else{
timeStr = '剛剛';
}
}
}
return timeStr;
}
50. 解決offsetX兼容性問題
// 針對火狐不支持offsetX/Y
function getOffset(e){
var target = e.target, // 當(dāng)前觸發(fā)的目標(biāo)對象
eventCoord,
pageCoord,
offsetCoord;
// 計(jì)算當(dāng)前觸發(fā)元素到文檔的距離
pageCoord = getPageCoord(target);
// 計(jì)算光標(biāo)到文檔的距離
eventCoord = {
X : window.pageXOffset + e.clientX,
Y : window.pageYOffset + e.clientY
};
// 相減獲取光標(biāo)到第一個(gè)定位的父元素的坐標(biāo)
offsetCoord = {
X : eventCoord.X - pageCoord.X,
Y : eventCoord.Y - pageCoord.Y
};
return offsetCoord;
}
function getPageCoord(element){
var coord = { X : 0, Y : 0 };
// 計(jì)算從當(dāng)前觸發(fā)元素到根節(jié)點(diǎn)為止，
// 各級 offsetParent 元素的 offsetLeft 或 offsetTop 值之和
while (element){
coord.X += element.offsetLeft;
coord.Y += element.offsetTop;
element = element.offsetParent;
}
return coord;
}
51. 常用的正則表達(dá)式
//正整數(shù)
/^[0-9]*[1-9][0-9]*$/;
//負(fù)整數(shù)
/^-[0-9]*[1-9][0-9]*$/;
//正浮點(diǎn)數(shù)
/^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$/;
//負(fù)浮點(diǎn)數(shù)
/^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/;
//浮點(diǎn)數(shù)
/^(-?\d+)(\.\d+)?$/;
//email地址
/^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/;
//url地址
/^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$/;
或：^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$
//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])$/;
//匹配中文字符
/[\u4e00-\u9fa5]/;
//匹配帳號是否合法(字母開頭，允許5-10字節(jié)，允許字母數(shù)字下劃線)
/^[a-zA-Z][a-zA-Z0-9_]{4,9}$/;
//匹配空白行的正則表達(dá)式
/\n\s*\r/;
//匹配中國郵政編碼
/[1-9]\d{5}(?!\d)/;
//匹配身份證
/\d{15}|\d{18}/;
//匹配國內(nèi)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?)/;
//匹配首尾空白字符的正則表達(dá)式
/^\s*|\s*$/;
//匹配HTML標(biāo)記的正則表達(dá)式
< (\S*?)[^>]*>.*?|< .*? />;
//sql 語句
^(select|drop|delete|create|update|insert).*$
//提取信息中的網(wǎng)絡(luò)鏈接
(h|H)(r|R)(e|E)(f|F) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?
//提取信息中的郵件地址
\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
//提取信息中的圖片鏈接
(s|S)(r|R)(c|C) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?
//提取信息中的 IP 地址
(\d+)\.(\d+)\.(\d+)\.(\d+)
//取信息中的中國手機(jī)號碼
(86)*0*13\d{9}
//提取信息中的中國郵政編碼
[1-9]{1}(\d+){5}
//提取信息中的浮點(diǎn)數(shù)（即小數(shù)）
(-?\d*)\.?\d+
//提取信息中的任何數(shù)字
(-?\d*)(\.\d+)?
//電話區(qū)號
^0\d{2,3}$
//騰訊 QQ 號
^[1-9]*[1-9][0-9]*$
//帳號（字母開頭，允許 5-16 字節(jié)，允許字母數(shù)字下劃線）
^[a-zA-Z][a-zA-Z0-9_]{4,15}$
//中文、英文、數(shù)字及下劃線
^[\u4e00-\u9fa5_a-zA-Z0-9]+$
52. 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');
53. 獲得URL中GET參數(shù)值
// 用法：如果地址是 test.htm?t1=1&t2=2&t3=3, 那么能取得：GET["t1"], GET["t2"], GET["t3"]
function get_get(){
querystr = window.location.href.split("?")
if(querystr[1]){
GETs = querystr[1].split("&");
GET = [];
for(i=0;i<GETs.length;i++){
tmp_arr = GETs.split("=")
key=tmp_arr[0]
GET[key] = tmp_arr[1]
}
}
return querystr[1];
}
54. 打開一個(gè)窗體通用方法
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();
}
}
55. 提取頁面代碼中所有網(wǎng)址
var aa = document.documentElement.outerHTML.match(/(url\(|src=|href=)[\"\']*([^\"\'\(\)\<\>\[\] ]+)[\"\'\)]*|(http:\/\/[\w\-\.]+[^\"\'\(\)\<\>\[\] ]+)/ig).join("\r\n").replace(/^(src=|href=|url\()[\"\']*|[\"\'\>\) ]*$/igm,"");
alert(aa);
56. 清除相同的數(shù)組
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")+"$","igm").test(y)){
y+=x+"\r\n"
}
}
return y
};
57. 按字母排序，對每行進(jìn)行數(shù)組排序
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;
}
58. 字符串反序
function IsReverse(text){
return text.split('').reverse().join('');
}
59. 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,"");
}
動(dòng)態(tài)執(zhí)行JavaScript腳本
function javascript(){
try{
eval(K1.value);
}catch(e){
alert(e.message);
}
}
60. 動(dòng)態(tài)執(zhí)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(cuò)誤!" \n End If',"vbscript")
}catch(e){
alert(e.message);
}
}
61. 金額大寫轉(zhuǎn)換函數(shù)
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", "叁", "肆", "伍", "陸", "柒", "捌", "玖"); //整數(shù)部分用
//以下是小寫轉(zhuǎn)換成大寫顯示在合計(jì)大寫的文本框中
//分離整數(shù)與小數(shù)
var source = splits(tranvalue);
var num = source[0];
var dig = source[1];
//轉(zhuǎn)換整數(shù)部分
var k1 = 0; //計(jì)小單位
var k2 = 0; //計(jì)大單位
var sum = 0;
var str = "";
var len = source[0].length; //整數(shù)的長度
for (i = 1; i <= len; i++) {
var n = source[0].charAt(len - i); //取得某個(gè)位數(shù)上的數(shù)字
var bn = 0;
if (len - i - 1 >= 0) {
bn = source[0].charAt(len - i - 1); //取得某個(gè)位數(shù)前一位上的數(shù)字
}
sum = sum + Number(n);
if (sum != 0) {
str = dw[Number(n)].concat(str); //取得該數(shù)字對應(yīng)的大寫數(shù)字，并插入到str字符串的前面
if (n == '0') sum = 0;
}
if (len - i - 1 >= 0) { //在數(shù)字范圍內(nèi)
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(shù)字則舍去大單位
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(jìn)一
k2++;
}
}
//轉(zhuǎn)換小數(shù)部分
var strdig = "";
if (dig != "") {
var n = dig.charAt(0);
if (n != 0) {
strdig += dw[Number(n)] + "角"; //加數(shù)字
}
var n = dig.charAt(1);
if (n != 0) {
strdig += dw[Number(n)] + "分"; //加數(shù)字
}
}
str += "元" + strdig;
} catch(e) {
return "0元";
}
return str;
}
//拆分整數(shù)與小數(shù)
function splits(tranvalue) {
var value = new Array('', '');
temp = tranvalue.split(".");
for (var i = 0; i < temp.length; i++) {
value = temp;
}
return value;
}
62. resize的操作
(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(dāng)窗體的寬度小于1255的時(shí)候執(zhí)行相應(yīng)的操作
}else{
//當(dāng)窗體的寬度大于1255的時(shí)候執(zhí)行相應(yīng)的操作
}
}
if(window.addEventListener){
window.addEventListener('resize', function(){ fn(); });
}else if(window.attachEvent){
window.attachEvent('onresize', function(){ fn(); });
}
fn();
})();
63. 實(shí)現(xiàn)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;
}
64. 實(shí)現(xiàn)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('');
}
65. 獲取窗體可見范圍的寬與高
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);
}
66. 斷鼠標(biāo)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);
}
67. 半角轉(zhuǎn)換為全角函數(shù)
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;
}
68. 全角轉(zhuǎn)換為半角函數(shù)
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;
}
via: css88
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