// 清除空格
String.prototype.trim = function (){
var s = /^\s*(.*?)\s+$/g;
return this.replace(s, '$1');
}
// 清除左空格/右空格
function ltrim (s){
return s.replace( /^(\s*| *)/g, '');
}
function rtrim (s){
return s.replace( /(\s*| *)$/g, '');
}
// 替换全部
String.prototype.replaceAll = function(s1, s2) {
return this.replace(new RegExp(s1, "gm"), s2);
}
// 判断是否以某个字符串开头
String.prototype.startWith = function (s){
return this.indexOf(s) == 0;
}
// 判断是否以某个字符串结束
String.prototype.endWith = function (s){
var d = this.length - s.length;
return (d>=0 && this.lastIndexOf(s) == d);
}
// 转义html标签
function HtmlEncode(text) {
return text.replace(/&/g, '&').replace(/\"/g, '"').replace(/</g, '<').replace(/>/g, '>')
}
// 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
}
// 判断是否为数字类型
function isDigit (value){
var patrn = /^[0-9]*$/;
if(patrn.exec(value) == null || value == ''){
return false;
}else{
return true;
}
}
// 设置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;"
}
// 加入收藏夹
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
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
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
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
function stripscript(s) {
return s.replace(/<script.*?>.*?<\/script>/ig, '');
}
// 动态加载脚本文件
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) {}
}
// 返回按ID检索的元素对象
function $(id) {
return !id ? null : document.getElementById(id);
}
// 跨浏览器绑定事件
function addEvent(obj, evt, fn){
if(!obj){return;}
if (obj.addEventListener) {
obj.addEventListener(evt, fn, false);
}else if(obj.attachEvent){
obj.attachEvent('on'+evt,fn);
}else{
obj["on" + evt] = fn;
}
}
// 跨浏览器删除事件
function removeEvent(obj,evt,fn){
if(!obj){return;}
if(obj.removeEventListener){
obj.removeEventListener(evt,fn,false);
}else if(oTarget.detachEvent){
obj.detachEvent("on" + evt,fn);
}else{
obj["on" + evt] = null;
}
}
// getElementsByClassName
function getElementsByClassName (name){
var tags = document.getElementsByTagName('*')||document.all;
var ele = [];
for (var i = 0; i < tags.length; i++){
if(tags.className){
var temp = tags.className.split(' ');
for(var j = 0; j < temp.length; j++){
if(name == temp[j]){
ele.push(tags);
break;
}
}
}
}
return ele;
}
// 获取页面高度
function getPageHeight (){
var doc = document;
var db = doc.body;
var de = doc.documentElement;
var dc = doc.compatMode == "BackCompat" ? bd : de;
return Math.max(de.scrollHeight, db.scrollHeight, dc.clientHeight);
}
// 获取页面宽度
function getPageWidth(){
var doc = document;
var db = doc.body;
var de = doc.documentElement;
var dc = doc.compatMode == "BackCompat" ? db : de;
return Math.max(de.scrollWidth, db.scrollWidth, dc.clientWidth);
}
// 获取页面可视宽度
function getPageViewWidth(){
var doc = document;
var dc = doc.compatMode == "BackCompat" ? doc.body : doc.documentElement;
return dc.clientWidth;
}
// 获取页面可视高度
function getPageViewHeight (){
var doc = document;
var dc = doc.compatMode == "BackCompat" ? doc.body : doc.documentElement;
return dc.clientHeight;
}
// 获取页面scrollLeft
function getPageScrollLeft(){
var doc = document;
return doc.documentElement.scrollLeft || doc.body.scrollLeft;
}
// 获取页面scrollTop
function getPageScrollTop(){
var doc = document;
return doc.documentElement.scrollTop || doc.body.scrollTop;
}
// 随机数时间戳
function uniqueId(){
var a=Math.random,b=parseInt;
return Number(new Date()).toString()+b(10*a())+b(10*a())+b(10*a());
}
// 时间个性化输出功能
/*
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),
year = date.getFullYear(),
month = date.getMonth() + 1,
day = date.getDate(),
hour = date.getHours(),
minute = date.getMinutes(),
curDate = new Date(),
curYear = curDate.getFullYear(),
curHour = curDate.getHours(),
timeStr = '';
if(year < curYear){
timeStr = year + '年' + month + '月' + day + '日 ' + hour + ':' + minute;
}else{
var pastTime = curDate - date;
var pastH = pastTime/(1000*60*60);
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;
}
// 返回顶部的通用方法
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"
}
};
// 获得URL中GET参数值
// 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];
}
// 清除相同的数组
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
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
function IsReverse(text){
return text.split('').reverse().join('');
}
// 清除html代码中的脚本
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,"");
}
// 动态执行JavaScript脚本
function javascript(){
try{
eval(K1.value);
}catch(e){
alert(e.message);
}
}
// 金额大写转换函数
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;
}
// 实现base64解码
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
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
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);
}
// 判断是否移动设备访问
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
function isAppleMobileDevice(){
return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));
}
// 判断是否安卓移动设备访问
function isAndroidMobileDevice(){
return (/android/i.test(navigator.userAgent.toLowerCase()));
}
// 判断是否Touch屏幕
function isTouchScreen(){
return (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch);
}
// 正整数
function isPositiveInt (s){
var reg = /^[0-9]*[1-9][0-9]*$/;
return reg.test(s);
}
// 负整数
function isNegtiveInt (s){
var reg = /^-[0-9]*[1-9][0-9]*$/;
return reg.test(s);
}
// 正浮点数
function isPositveFloat (s){
var reg = /^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$/;
return reg.test(s);
}
// 负浮点数
function isNegtiveFloat (s){
var reg = /^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/;
return reg.test(s);
}
// 浮点数
function isFloat (s){
var reg = /^(-?\d+)(\.\d+)?$/;
return reg.test(s);
}
// email地址
function isEmail (s){
var reg = /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/;
return reg.test(s);
}
// url地址
function isUrl (s){
var reg = /^[a-zA-z]+:\/\/(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$/;
// var reg = /^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$/;
return reg.test(s);
}
// 年/月/日(年-月-日、年.月.日)
function isDate (s){
var reg = /^(19|20)\d\d[- \.](0[1-9]|1[012])[- \.](0[1-9]|[12][0-9]|3[01])$/;
return reg.test(s);
}
//匹配中文字符
function isChina (s){
var reg = /[\u4e00-\u9fa5]/;
return reg.test(s);
}
// 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)
function isValid (s){
var reg = /^[a-zA-Z][a-zA-Z0-9_]{4,9}$/;
return reg.test(s);
}
// 匹配空白行的正则表达式
function isBlank (s){
var reg = /\n\s*\r/;
return reg.test(s);
}
// 匹配中国邮政编码
function isZipCode (s){
var reg = /[1-9]\d{5}(?!\d)/;
return reg.test(s);
}
// 匹配身份证
function isIdentityCard (s){
var reg = /\d{15}|\d{18}/;
return reg.test(s);
}
// 匹配国内电话号码
function isCivilTel (s){
var reg = /(\d{3}-|\d{4}-)?(\d{8}|\d{7})?/;
return reg.test(s);
}
// 匹配IP地址
function isIp (s){
var reg = /((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)/;
return reg.test(s);
}
// 匹配首尾空白字符的正则表达式
// function isLRBlank (s){
// var reg = /^\s*|\s*$/;
// return reg.test(s);
// }
// 匹配HTML标记的正则表达式
function isHtml (s){
var reg = /< (\S*?)[^>]*>.*?|< .*? \/>/;
return reg.test(s);
}
// sql 语句
function isSql (s){
var reg = /^(select|drop|delete|create|update|insert).*$/;
return reg.test(s);
}
// 提取信息中的网络链接
function isGetNet (s){
var reg = /(h|H)(r|R)(e|E)(f|F) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?/;
return reg.test(s);
}
// 提取信息中的邮件地址
function isGetEmail (s){
var reg = /\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/;
return reg.test(s);
}
// 提取信息中的图片链接
function isGetImg (s){
var reg = /(s|S)(r|R)(c|C) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?/;
return reg.test(s);
}
// 提取信息中的 IP 地址
function isGetIp (s){
var reg = /(\d+)\.(\d+)\.(\d+)\.(\d+)/;
return reg.test(s);
}
// 取信息中的中国手机号码
function isGetPhone (s){
var reg = /(86)*0*13\d{9}/;
return reg.test(s);
}
// 提取信息中的中国邮政编码
function isGetZipCode (s){
var reg = /[1-9]{1}(\d+){5}/;
return reg.test(s);
}
// 提取信息中的浮点数(即小数)
function isGetFloat (s){
var reg = /(-?\d*)\.?\d+/;
return reg.test(s);
}
// 提取信息中的任何数字
function isGetNum (s){
var reg = /(-?\d*)(\.\d+)?/;
return reg.test(s);
}
// 电话区号
function isGetAreaTel (s){
var reg = /^0\d{2,3}$/;
return reg.test(s);
}
//腾讯 QQ 号
function isGetAreaTel (s){
var reg = /^[1-9]*[1-9][0-9]*$/;
return reg.test(s);
}
//帐号(字母开头,允许 5-16 字节,允许字母数字下划线)
function isGetAccount (s){
var reg = /^[a-zA-Z][a-zA-Z0-9_]{4,15}$/;
return reg.test(s);
}
//中文、英文、数字及下划线
function isCommon (s){
var reg = /^[\u4e00-\u9fa5_a-zA-Z0-9]+$/;
return reg.test(s);
}
常用js函数
最新推荐文章于 2025-07-04 10:52:03 发布