经常使用的程序t常 JS 方法，今天记下，员花用方以便以后查询。小时写

/* 手机类型判断 */

var BrowserInfo = { userAgent: navigator.userAgent.toLowerCase() isAndroid: Boolean(navigator.userAgent.match(/android/ig)),法总 isIphone: Boolean(navigator.userAgent.match(/iphone|ipod/ig)), isIpad: Boolean(navigator.userAgent.match(/ipad/ig)), isWeixin: Boolean(navigator.userAgent.match(/MicroMessenger/ig)), }

/* 返回字符串长度，汉子计数为2 */

function strLength(str) { var a = 0; for (var i = 0; i < str.length; i++) { if (str.charCodeAt(i) > 255) a += 2;//按照预期计数增加2 else a++; } return a; }

获取url中的程序t常参数

function GetQueryStringRegExp(name,url) { var reg = new RegExp("(^|\?|&)" + name + "=([^&]*)(\s|&|$)", "i"); if (reg.test(url)) return decodeURIComponent(RegExp.$2.replace(/+/g, " ")); return ""; }

/* js 绑定事件 适用于任何浏览器的元素绑定 */

function eventBind(obj, eventType, callBack) { if (obj.addEventListener) { obj.addEventListener(eventType, callBack, false); } else if (window.attachEvent) { obj.attachEvent(on + eventType, callBack); } else { obj[on + eventType] = callBack; } }; eventBind(document, click, bodyClick);

/* 获得当前浏览器JS的版本 */

function getjsversion(){ var n = navigator; var u = n.userAgent; var apn = n.appName; var v = n.appVersion; var ie = v.indexOf(MSIE ); if (ie > 0){ apv = parseInt(i = v.substring(ie + 5)); if (apv > 3) { apv = parseFloat(i); } } else { apv = parseFloat(v); } var isie = (apn == Microsoft Internet Explorer); var ismac = (u.indexOf(Mac) >= 0); var javascriptVersion = "1.0"; if (String && String.prototype) { javascriptVersion = 1.1; if (javascriptVersion.match) { javascriptVersion = 1.2; var tm = new Date; if (tm.setUTCDate) { javascriptVersion = 1.3; if (isie && ismac && apv >= 5) javascriptVersion = 1.4; var pn = 0; if (pn.toPrecision) { javascriptVersion = 1.5; a = new Array; if (a.forEach) { javascriptVersion = 1.6; i = 0; o = new Object; tcf = new Function(o, var e,i=0;try{ i=new Iterator(o)}catch(e){ }return i); i = tcf(o); if (i && i.next) { javascriptVersion = 1.7; } } } } } } return javascriptVersion; }

/* 获取当前点击事件的Object对象 */

function getEvent() { if (document.all) { return window.event; //如果是ie } func = getEvent.caller; while (func != null) { var arg0 = func.arguments[0]; if (arg0) { if ((arg0.constructor == Event || arg0.constructor == MouseEvent) || (typeof (arg0) == "object" && arg0.preventDefault && arg0.stopPropagation)) { return arg0; } } func = func.caller; } return null; };

/* 字符串截取方法 */

getCharactersLen: function (charStr, cutCount) { if (charStr == null || charStr == ) return ; var totalCount = 0; var newStr = ; for (var i = 0; i < charStr.length; i++) { var c = charStr.charCodeAt(i); if (c < 255 && c > 0) { totalCount++; } else { totalCount += 2; } if (totalCount >= cutCount) { newStr += charStr.charAt(i); break; } else { newStr += charStr.charAt(i); } } return newStr; }

/* JS 弹出新窗口全屏 */

var tmp = window.open("about:blank", "", "fullscreen=1") tmp.moveTo(0, 0); tmp.resizeTo(screen.width + 20, screen.height); tmp.focus(); tmp.location.href = //www.che168.com/pinggu/eva_ + msgResult.message[0] + .html; var config_ = "left=0,top=0,width=" + (window.screen.Width) + ",height=" + (window.screen.Height); window.open(//www.che168.com/pinggu/eva_ + msgResult.message[0] + .html, "winHanle", config_); //模拟form提交打开新页面 var f = document.createElement("form"); f.setAttribute(action, //www.che168.com/pinggu/eva_ + msgResult.message[0] + .html); f.target = _blank; document.body.appendChild(f); f.submit();

/* 全选/全不选 */

function selectAll(objSelect) { if (objSelect.checked == true) { $("input[name=chkId]").attr("checked", true); $("input[name=chkAll]").attr("checked", true); } else if (objSelect.checked == false) { $("input[name=chkId]").attr("checked", false); $("input[name=chkAll]").attr("checked", false); } }

/* js 判断浏览器 */

判断是否是 IE 浏览器 if (document.all){ alert(”IE浏览器”); }else{ alert(”非IE浏览器”); } if (!!window.ActiveXObject){ alert(”IE浏览器”); }else{ alert(”非IE浏览器”); } 判断是IE几 var isIE=!!window.ActiveXObject; var isIE6=isIE&&!window.XMLHttpRequest; var isIE8=isIE&&!!document.documentMode; var isIE7=isIE&&!isIE6&&!isIE8; if (isIE){ if (isIE6){ alert(”ie6″); }else if (isIE8){ alert(”ie8″); }else if (isIE7){ alert(”ie7″); } }

/* 判断浏览器 */

function getOs() { if (navigator.userAgent.indexOf("MSIE 8.0") > 0) { return "MSIE8"; } else if (navigator.userAgent.indexOf("MSIE 6.0") > 0) { return "MSIE6"; } else if (navigator.userAgent.indexOf("MSIE 7.0") > 0) { return "MSIE7"; } else if (isFirefox = navigator.userAgent.indexOf("Firefox") > 0) { return "Firefox"; } if (navigator.userAgent.indexOf("Chrome") > 0) { return "Chrome"; } else { return "Other"; } }

/* JS判断两个日期大小 适合 2012-09-09 与2012-9-9 两种格式的对比 */

//得到日期值并转化成日期格式，replace(/-/g,员花用方 "/")是亿华云计算根据验证表达式把日期转化成长日期格式，这样再进行判断就好判断了 function ValidateDate() { var beginDate = $("#t_datestart").val(); var endDate = $("#t_dateend").val(); if (beginDate.length > 0 && endDate.length>0) { var sDate = new Date(beginDate.replace(/-/g,小时写 "/")); var eDate= new Date(endDate.replace(/-/g, "/")); if (sDate > eDate) { alert(开始日期要小于结束日期); return false; } } }

/* 移除事件 */

this.moveBind = function (objId, eventType, callBack) { var obj = document.getElementById(objId); if (obj.removeEventListener) { obj.removeEventListener(eventType, callBack, false); } else if (window.detachEvent) { obj.detachEvent(on + eventType, callBack); } else { obj[on + eventType] = null; } }

/* 回车提交 */

$("id").onkeypress = function (event) { event = (event) ? event : ((window.event) ? window.event : "") keyCode = event.keyCode ? event.keyCode : (event.which ? event.which : event.charCode); if (keyCode == 13) { $("SubmitLogin").onclick(); } }

/* JS 执行计时器 */

timeStart = new Date().getTime(); timesEnd = new Date().getTime(); document.getElementById("time").innerHTML = timesEnd - timeStart;

/* JS 写Cookie */

function setCookie(name, value, expires, path, domain) { if (!expires) expires = -1; if (!path) path = "/"; var d = "" + name + "=" + value; var e; if (expires < 0) { e = ""; } else if (expires == 0) { var f = new Date(1970, 1, 1); e = ";expires=" + f.toUTCString(); } else { var now = new Date(); var f = new Date(now.getTime() + expires * 1000); e = ";expires=" + f.toUTCString(); } var dm; if (!domain) { dm = ""; } else { dm = ";domain=" + domain; } document.cookie = name + "=" + value + ";path=" + path + e + dm; };

/* JS 读Cookie */

function readCookie(name) { var nameEQ = name + "="; var ca = document.cookie.split(;); for (var i = 0; i < ca.length; i++) { var c = ca[i]; while (c.charAt(0) == ) c = c.substring(1, c.length); if (c.indexOf(nameEQ) == 0) { return decodeURIComponent(c.substring(nameEQ.length, c.length)) } } return null }

/* Ajax 请求 */

C.ajax = function (args) { var self = this; this.options = { type: GET, async: true, contentType: application/x-www-form-urlencoded, url: about:blank, data: null, success: { }, error: { } }; this.getXmlHttp = function () { var xmlHttp; try { xmlhttp = new XMLHttpRequest(); } catch (e) { try { xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); } } if (!xmlhttp) { alert(您的浏览器不支持AJAX); return false; } return xmlhttp; }; this.send = function () { C.each(self.options, function (key, val) { self.options[key] = (args[key] == null) ? val : args[key]; }); var xmlHttp = new self.getXmlHttp(); if (self.options.type.toUpperCase() == GET) { xmlHttp.open(self.options.type, self.options.url + (self.options.data == null ? "" : ((/[?]$/.test(self.options.url) ? & : ?) + self.options.data)), self.options.async); } else { xmlHttp.open(self.options.type, self.options.url, self.options.async); xmlHttp.setRequestHeader(Content-Length, self.options.data.length); } xmlHttp.setRequestHeader(Content-Type, self.options.contentType); xmlHttp.onreadystatechange = function () { if (xmlHttp.readyState == 4) { if (xmlHttp.status == 200 || xmlHttp.status == 0) { if (typeof self.options.success == function) self.options.success(xmlHttp.responseText); xmlHttp = null; } else { if (typeof self.options.error == function) self.options.error(Server Status: + xmlHttp.status); } } }; xmlHttp.send(self.options.type.toUpperCase() == POST ? self.options.data.toString() : null); }; this.send(); };

/* JS StringBuilder 用法 */

function StringBuilder() { this.strings = new Array; }; StringBuilder.prototype.append = function (str) { this.strings.push(str); }; StringBuilder.prototype.toString = function () { return this.strings.join(); };

/* JS 加载到顶部LoadJS */

function loadJS (url, fn) { var ss = document.getElementsByName(script), loaded = false; for (var i = 0, len = ss.length; i < len; i++) { if (ss[i].src && ss[i].getAttribute(src) == url) { loaded = true; break; } } if (loaded) { if (fn && typeof fn != undefined && fn instanceof Function) fn(); return false; } var s = document.createElement(script), b = false; s.setAttribute(type, text/javascript); s.setAttribute(src, url); s.onload = s.onreadystatechange = function () { if (!b && (!this.readyState || this.readyState == loaded || this.readyState == complete)) { b = true; if (fn && typeof fn != undefined && fn instanceof Function) fn(); } }; document.getElementsByTagName(head)[0].appendChild(s); }, bind: function (objId, eventType, callBack) { //适用于任何浏览器的绑定 var obj = document.getElementById(objId); if (obj.addEventListener) { obj.addEventListener(eventType, callBack, false); } else if (window.attachEvent) { obj.attachEvent(on + eventType, callBack); } else { obj[on + eventType] = callBack; } } function JSLoad (args) { s = document.createElement("script"); s.setAttribute("type", "text/javascript"); s.setAttribute("src", args.url); s.onload = s.onreadystatechange = function () { if (!s.readyState || s.readyState == "loaded" || s.readyState == "complete") { if (typeof args.callback == "function") args.callback(this, args); s.onload = s.onreadystatechange = null; try { s.parentNode && s.parentNode.removeChild(s); } catch (e) { } } }; document.getElementsByTagName("head")[0].appendChild(s); }

/* 清空 LoadJS 加载到顶部的js引用 */

function ClearHeadJs (src) { var js = document.getElementsByTagName(head)[0].children; var obj = null; for (var i = 0; i < js.length; i++) { if (js[i].tagName.toLowerCase() == "script" && js[i].attributes[src].value.indexOf(src) > 0) { obj = js[i]; } } document.getElementsByTagName(head)[0].removeChild(obj); };

/* JS 替换非法字符主要用在密码验证上出现的特殊字符 */

function URLencode(sStr) { return escape(sStr).replace(/+/g, %2B).replace(/"/g, %22).replace(//g, %27).replace(///g, %2F); };

/* 按Ctrl + Entert 直接提交表单 */

document.body.onkeydown = function (evt) { evt = evt ? evt : (window.event ? window.event : null); if (13 == evt.keyCode && evt.ctrlKey) { evt.returnValue = false; evt.cancel = true; PostData(); } };

/* 获取当前时间 */

function GetCurrentDate() { var d = new Date(); var y = d.getYear()+1900; month = add_zero(d.getMonth() + 1), days = add_zero(d.getDate()), hours = add_zero(d.getHours()); minutes = add_zero(d.getMinutes()), seconds = add_zero(d.getSeconds()); var str = y + - + month + - + days + + hours + : + minutes + : + seconds; return str; }; function add_zero(temp) { if (temp < 10) return "0" + temp; else return temp; }

/* Js 去掉空格方法： */

String.prototype.Trim = function() { return this.replace(/(^s*)|(s*$)/g, ""); } String.prototype.LTrim = function() { return this.replace(/(^s*)/g, "");} String.prototype.RTrim = function() { return this.replace(/(s*$)/g, "");}

/* js 动态移除 head 里的 js 引用 */

this.ClearHeadJs = function (src) { var js = document.getElementsByTagName(head)[0].children; var obj = null; for (var i = 0; i < js.length; i++) { if (js[i].tagName.toLowerCase() == "script" && js[i].attributes[src].value.indexOf(src) > 0) { obj = js[i]; } } document.getElementsByTagName(head)[0].removeChild(obj); };

/* 整个UL 点击事件 加在UL里的onclick里 */

function CreateFrom(url, params) { var f = document.createElement("form"); f.setAttribute("action", url); for (var i = 0; i < params.length; i++) { var input = document.createElement("input"); input.setAttribute("type", "hidden"); input.setAttribute("name", params[i].paramName); input.setAttribute("value", params[i].paramValue); f.appendChild(input); } f.target = "_blank"; document.body.appendChild(f); f.submit(); };

/* 判断浏览器使用的是哪个 JS 版本 */

var jsversion = 1.0;

jsversion = 1.1;

jsversion = 1.2;

jsversion = 1.3;

jsversion = 1.4;

jsversion = 1.5;

jsversion = 1.6;

jsversion = 1.7;

jsversion = 1.8;

jsversion = 1.9;

jsversion = 2.0;

alert(jsversion);

***在说几句：厉害程序员相对于普通程序员的优势在于：写出的代码更容易排错，不是法总高手的代码就不会错，云南idc服务商而是程序t常高手的代码出了错容易找。高手的员花用方代码可读性一定很好，模块清晰，小时写命名规范，法总格式工整，程序t常关键的员花用方地方有注释，出了异常有log，小时写自然容易排错，即使交给别人去debug也是比较容易的。源码下载