11 确认是否是键盘有效输入值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;}12 全角半角转换//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("");}13 版本对比function compareVersion(v1, v2) {v1 = v1.split(".");v2 = v2.split(".");var len = Math.max(v1.length, v2.length);while (v1.length < len) {v1.push("0");}while (v2.length < len) {v2.push("0");}for (var i = 0; i < len; i++) {var num1 = parseInt(v1[i]);var num2 = parseInt(v2[i]);if (num1 > num2) {return 1;} else if (num1 < num2) {return -1;}}return 0;}14 压缩css样式代码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];}15 获取当前路径var currentPageUrl = "";if (typeof this.href =https://www.isolves.com/it/cxkf/yy/js/2020-08-05/== "undefined") {currentPageUrl = document.location.toString().toLowerCase();} else {currentPageUrl = this.href.toString().toLowerCase();}16 字符串长度截取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 + "..."}17 时间日期格式转换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;};// 或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), //quarterS: 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"));18 跨浏览器删除事件【内含95个工具函数 前端大佬都在使用的JavaScript工具函数宝典】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;}}