JavaScript常用函数收集

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脑袋不好使就多记笔记，收集了一些比较常用的javascript函数，以备急用。

字符串长度截取

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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 + "..."
}

替换全部

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String.prototype.replaceAll = function(s1, s2) {
    return this.replace(new RegExp(s1, "gm"), s2)
}

清除空格

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String.prototype.trim = function() {
    var reExtraSpace = /^\s*(.*?)\s+$/;
    return this.replace(reExtraSpace, "$1")
}

清除左空格/右空格

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function ltrim(s){ return s.replace( /^(\s*|　*)/, ""); }
function rtrim(s){ return s.replace( /(\s*|　*)$/, ""); }

判断是否以某个字符串开头

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String.prototype.startWith = function (s) {
    return this.indexOf(s) == 0
}

判断是否以某个字符串结束

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String.prototype.endWith = function (s) {
    var d = this.length - s.length;
    return (d >= 0 && this.lastIndexOf(s) == d)
}

转义html标签

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function HtmlEncode(text) {
    return text.replace(/&/g, '&').replace(/\"/g, '"').replace(/</g, '<').replace(/>/g, '>')
}

时间日期格式转换

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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
}

判断是否为数字类型

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function isDigit(value) {
    var patrn = /^[0-9]*$/;
    if (patrn.exec(value) == null || value == "") {
return false
    } else {
return true
    }
}

设置cookie值

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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;"
}

获取cookie值

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function getCookie(name) {
    var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
    if (arr != null) return unescape(arr[2]);
    return null
}

加入收藏夹

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function AddFavorite(sURL, sTitle) {
    try {
window.external.addFavorite(sURL, sTitle)
    } catch(e) {
try {
window.sidebar.addPanel(sTitle, sURL, "")
} catch(e) {
alert("加入收藏失败，请使用Ctrl+D进行添加")
}
    }
}

设为首页

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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("该操作被浏览器拒绝，如果想启用该功能，请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true")
}
}
var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch);        prefs.setCharPref('browser.startup.homepage', 'http://w3cboy.com')
    }
}

加载样式文件

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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)
    }
}

返回脚本内容

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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;
}

清除脚本内容

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function stripscript(s) {
    return s.replace(/<script.*?>.*?<\/script>/ig, '');
}


动态加载脚本文件

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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) {}
}

返回按ID检索的元素对象

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function $(id) {    return !id ? null : document.getElementById(id);}

跨浏览器绑定事件

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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;
}
}

跨浏览器删除事件

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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;
    }
}

为元素添加on方法

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Element.prototype.on = Element.prototype.addEventListener;
NodeList.prototype.on = function (event, fn) {
    []['forEach'].call(this, function (el) {
el.on(event, fn);
    });
    return this;
};

为元素添加trigger方法

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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;
};

检验URL链接是否有效

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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);
}
     }
}

格式化CSS样式代码

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function formatCss(s){//格式化代码
    s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1");
    s = s.replace(/;\s*;/g, ";"); //清除连续分号
    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;
}

压缩CSS样式代码

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function compressCss (s) {//压缩代码
    s = s.replace(/\/\*(.|\n)*?\*\//g, ""); //删除注释
    s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1");
    s = s.replace(/\,[\s\.\#\d]*\{/g, "{"); //容错处理
    s = s.replace(/;\s*;/g, ";"); //清除连续分号
    s = s.match(/^\s*(\S+(\s+\S+)*)\s*$/); //去掉首尾空白
    return (s == null) ? "" : s[1];
}

获取当前路径

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var currentPageUrl = "";if (typeof this.href === "undefined") {
    currentPageUrl = document.location.toString().toLowerCase();
}else {
    currentPageUrl = this.href.toString().toLowerCase();
}

判断是否移动设备

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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;
}

判断是否移动设备访问

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function isMobileUserAgent(){
    return (/iphone|ipod|android.*mobile|windows.*phone|blackberry.*mobile/i.test(window.navigator.userAgent.toLowerCase()));
}

判断是否苹果移动设备访问

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function isAppleMobileDevice(){
    return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));
}

判断是否安卓移动设备访问

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function isAndroidMobileDevice(){
    return (/android/i.test(navigator.userAgent.toLowerCase()));
}

判断是否Touch屏幕

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function isTouchScreen(){
    return (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch);
}

判断是否打开视窗

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function isViewportOpen() {
    return !!document.getElementById('wixMobileViewport');
}

获取移动设备初始化大小

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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;
}

获取移动设备最大化大小

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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;
    }
}

获取移动设备屏幕宽度

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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;
}

完美判断是否为网址

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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;
    }
}

getElementsByClassName

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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
}

获取页面高度

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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);
}

获取页面scrollLeft

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function getPageScrollLeft(){
    var a = document;
    return a.documentElement.scrollLeft || a.body.scrollLeft;
}

获取页面可视宽度

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function getPageViewWidth(){
    var d = document, a = d.compatMode == "BackCompat"
? d.body
: d.documentElement;
    return a.clientWidth;
}

获取页面宽度

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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);
}

获取页面scrollTop

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function getPageScrollTop(){
    var a = document;
    return a.documentElement.scrollTop || a.body.scrollTop;
}

获取页面可视高度

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function getPageViewHeight() {
    var d = document, a = d.compatMode == "BackCompat"
? d.body
: d.documentElement;
    return a.clientHeight;
}

去掉url前缀

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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;
}

随机数时间戳

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function uniqueId(){
    var a=Math.random,b=parseInt;
    return Number(new Date()).toString()+b(10*a())+b(10*a())+b(10*a());
}

全角半角转换

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//iCase: 0全到半，1半到全，其他不转化
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("");
}

确认是否键盘有效输入值

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function checkKey(iKey){
    if(iKey == 32 || iKey == 229){return true;}/*空格和异常*/
    if(iKey>47 && iKey < 58){return true;}/*数字*/
    if(iKey>64 && iKey < 91){return true;}/*字母*/
    if(iKey>95 && iKey < 108){return true;}/*数字键盘1*/
    if(iKey>108 && iKey < 112){return true;}/*数字键盘2*/
    if(iKey>185 && iKey < 193){return true;}/*符号1*/
    if(iKey>218 && iKey < 223){return true;}/*符号2*/
    return false;
}

获取网页被卷去的位置

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function getScrollXY() {
    return document.body.scrollTop ? {
x: document.body.scrollLeft,
y: document.body.scrollTop
}: {
x: document.documentElement.scrollLeft,
y: document.documentElement.scrollTop
}
}

日期格式化函数+调用方法

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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"));

时间个性化输出功能

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/*
1、< 60s, 显示为“刚刚”
2、>= 1min && < 60 min, 显示与当前时间差“XX分钟前”
3、>= 60min && < 1day, 显示与当前时间差“今天 XX:XX”
4、>= 1day && < 1year, 显示日期“XX月XX日 XX:XX”
5、>= 1year, 显示具体日期“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 +'分钟前';
}else{
timeStr = '刚刚';
}
}
    }
    return timeStr;
}

解决offsetX兼容性问题

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// 针对火狐不支持offsetX/Y
function getOffset(e){
    var target = e.target, // 当前触发的目标对象
eventCoord,
pageCoord,
offsetCoord;
// 计算当前触发元素到文档的距离
pageCoord = getPageCoord(target);
 
// 计算光标到文档的距离
eventCoord = {
        X : window.pageXOffset + e.clientX,
        Y : window.pageYOffset + e.clientY
};
 
// 相减获取光标到第一个定位的父元素的坐标
offsetCoord = {
X : eventCoord.X - pageCoord.X,
Y : eventCoord.Y - pageCoord.Y
};
    return offsetCoord;} function getPageCoord(element){
    var coord = { X : 0, Y : 0 };
 
    // 计算从当前触发元素到根节点为止，
    // 各级 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;
}

常用的正则表达式

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//正整数/^[0-9]*[1-9][0-9]*$/;
//负整数/^-[0-9]*[1-9][0-9]*$/;
//正浮点数/^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$/;
//负浮点数/^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/;  
//浮点数/^(-?\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])$/;
//匹配中文字符/[\u4e00-\u9fa5]/;
//匹配帐号是否合法(字母开头，允许5-10字节，允许字母数字下划线)/^[a-zA-Z][a-zA-Z0-9_]{4,9}$/;
//匹配空白行的正则表达式/\n\s*\r/;
//匹配中国邮政编码/[1-9]\d{5}(?!\d)/;
//匹配身份证/\d{15}|\d{18}/;
//匹配国内电话号码/(\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则表达式/^\s*|\s*$/;
//匹配HTML标记的正则表达式< (\S*?)[^>]*>.*?|< .*? />;
//sql 语句^(select|drop|delete|create|update|insert).*$
//提取信息中的网络链接(h|H)(r|R)(e|E)(f|F) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?
//提取信息中的邮件地址\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
//提取信息中的图片链接(s|S)(r|R)(c|C) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?
//提取信息中的 IP 地址(\d+)\.(\d+)\.(\d+)\.(\d+)
//取信息中的中国手机号码(86)*0*13\d{9}
//提取信息中的中国邮政编码[1-9]{1}(\d+){5}
//提取信息中的浮点数（即小数）(-?\d*)\.?\d+
//提取信息中的任何数字(-?\d*)(\.\d+)?
//电话区号^0\d{2,3}$//腾讯 QQ 号^[1-9]*[1-9][0-9]*$
//帐号（字母开头，允许 5-16 字节，允许字母数字下划线）^[a-zA-Z][a-zA-Z0-9_]{4,15}$
//中文、英文、数字及下划线^[\u4e00-\u9fa5_a-zA-Z0-9]+$

返回顶部的通用方法

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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');

获得URL中GET参数值

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// 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];
}

打开一个窗体通用方法

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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();
    }
}

提取页面代码中所有网址

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var aa = document.documentElement.outerHTML.match(/(url\(|src=|href=)[\"\']*([^\"\'\(\)\<\>\[\] ]+)[\"\'\)]*|(http:\/\/[\w\-\.]+[^\"\'\(\)\<\>\[\] ]+)/ig).join("\r\n").replace(/^(src=|href=|url\()[\"\']*|[\"\'\>\) ]*$/igm,"");alert(aa);

清除相同的数组

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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
};

按字母排序，对每行进行数组排序

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function SetSort(){
    var text=K1.value.split(/[\r\n]/).sort().join("\r\n");//顺序
    var test=K1.value.split(/[\r\n]/).sort().reverse().join("\r\n");//反序
    K1.value=K1.value!=text?text:test;
}

字符串反序

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function IsReverse(text){
    return text.split('').reverse().join('');
}

清除html代码中的脚本

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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,"");
}
//动态执行JavaScript脚本
 
function javascript(){
    try{
eval(K1.value);
    }catch(e){
alert(e.message);
    }
}

动态执行VBScript脚本

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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 "请输入正确的VBScript脚本!",48,"脚本错误!" \n End If',"vbscript")
    }catch(e){
alert(e.message);
    }
}

金额大写转换函数

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function transform(tranvalue) {
try {
var i = 1;
var dw2 = new Array("", "万", "亿"); //大单位
var dw1 = new Array("拾", "佰", "仟"); //小单位
var dw = new Array("零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"); //整数部分用
//以下是小写转换成大写显示在合计大写的文本框中    
//分离整数与小数
var source = splits(tranvalue);
var num = source[0];
var dig = source[1];
//转换整数部分
var k1 = 0; //计小单位
var k2 = 0; //计大单位
var sum = 0;
var str = "";
var len = source[0].length; //整数的长度
for (i = 1; i <= len; i++) {   var n = source[0].charAt(len - i); //取得某个位数上的数字   var bn = 0;   if (len - i - 1 >= 0) {
bn = source[0].charAt(len - i - 1); //取得某个位数前一位上的数字
  }
  sum = sum + Number(n);
  if (sum != 0) {
str = dw[Number(n)].concat(str); //取得该数字对应的大写数字，并插入到str字符串的前面
if (n == '0') sum = 0;
  }
  if (len - i - 1 >= 0) { //在数字范围内
if (k1 != 3) { //加小单位
  if (bn != 0) {
str = dw1[k1].concat(str);
  }
  k1++;
} else { //不加小单位，加大单位
  k1 = 0;
  var temp = str.charAt(0);
  if (temp == "万" || temp == "亿") //若大单位前没有数字则舍去大单位
  str = str.substr(1, str.length - 1);
  str = dw2[k2].concat(str);
  sum = 0;
}
  }
  if (k1 == 3){ //小单位到千则大单位进一
k2++;
  }
}
//转换小数部分
var strdig = "";
if (dig != "") {
  var n = dig.charAt(0);
  if (n != 0) {
strdig += dw[Number(n)] + "角"; //加数字
  }
  var n = dig.charAt(1);
  if (n != 0) {
strdig += dw[Number(n)] + "分"; //加数字
  }
}
str += "元" + strdig;
} catch(e) {
return "0元";
}
return str;
}
//拆分整数与小数
function splits(tranvalue) {
var value = new Array('', '');
temp = tranvalue.split(".");
for (var i = 0; i < temp.length; i++) {
value = temp;
}
return value;
}

resize的操作

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(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){
//当窗体的宽度小于1255的时候执行相应的操作
}else{
//当窗体的宽度大于1255的时候执行相应的操作
}
    }
    if(window.addEventListener){
window.addEventListener('resize', function(){ fn(); });
    }else if(window.attachEvent){
window.attachEvent('onresize', function(){ fn(); });
    }
    fn();
})();

实现base64解码

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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;
}

实现utf8解码

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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('');
}

获取窗体可见范围的宽与高

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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);
}

断鼠标是否移出事件

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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);
}

半角转换为全角函数

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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;
}

全角转换为半角函数

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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;
}

承接各种网站开发与修改、爬虫、数据采集分析、小程序等任务

Html+Css+JS+PHP+Nodejs+Python

专治网站各种不服

一起探讨，互相学习，共同进步！有事儿您说话。

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