1、原生JavaScript实现字符串长度截取
function cutstr(str, len) {
var temp;
var icount = 0;
var patrn = /[^/x00-/xff]/;
var 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、原生JavaScript获取域名主机
function getHost(url) {
var host = "null";
if(typeof url == "undefined"|| null == url) {
url = window.location.href;
}
var regex = /^/w+/:////([^//]*).*/;
var match = url.match(regex);
if(typeof match != "undefined" && null != match) {
host = match[1];
}
return host;
}
3、原生JavaScript清除空格
String.prototype.trim = function() {
var reExtraSpace = /^/s*(.*?)/s+$/;
return this.replace(reExtraSpace, "$1")
}
4、原生JavaScript替换全部
String.prototype.replaceAll = function(s1, s2) {
return this.replace(new RegExp(s1, "gm"), s2)
}
5、原生JavaScript转义html标签
function HtmlEncode(text) {
return text.replace(/&/g, '&').replace(//"/g, '"').replace(/</g, '<').replace(/>/g, '>')
}
6、原生JavaScript还原html标签
function HtmlDecode(text) {
return text.replace(/&/g, '&').replace(/"/g, '/"').replace(/</g, '<').replace(/>/g, '>')
}
7、原生JavaScript时间日期格式转换
Date.prototype.Format = function(formatStr) {
var str = formatStr;
var Week = ['日', '一', '二', '三', '四', '五', '六'];
str = str.replace(/yyyy|YYYY/, this.getFullYear());
str = str.replace(/yy|YY/, (this.getYear() % 100) > 9 ? (this.getYear() % 100).toString() : '0' + (this.getYear() % 100));
str = str.replace(/MM/, (this.getMonth() + 1) > 9 ? (this.getMonth() + 1).toString() : '0' + (this.getMonth() + 1));
str = str.replace(/M/g, (this.getMonth() + 1));
str = str.replace(/w|W/g, Week[this.getDay()]);
str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : '0' + this.getDate());
str = str.replace(/d|D/g, this.getDate());
str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : '0' + this.getHours());
str = str.replace(/h|H/g, this.getHours());
str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : '0' + this.getMinutes());
str = str.replace(/m/g, this.getMinutes());
str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : '0' + this.getSeconds());
str = str.replace(/s|S/g, this.getSeconds());
return str
}
8、原生JavaScript判断是否为数字类型
function isDigit(value) {
var patrn = /^[0-9]*$/;
if (patrn.exec(value) == null || value == "") {
return false
} else {
return true
}
}
9、原生JavaScript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;"
}
10、原生JavaScript获取cookie值
function getCookie(name) {
var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
if (arr != null) return unescape(arr[2]);
return null
}
11、原生JavaScript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")
}
}
}
12、原生JavaScript设为首页
function setHomepage() {
if (document.all) {
document.body.style.behavior = 'url(#default#homepage)';
document.body.setHomePage('http://www.jq-school.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://www.jq-school.com')
}
}
13、原生JavaScript判断IE6
var ua = navigator.userAgent.toLowerCase();
var isIE6 = ua.indexOf("msie 6") > -1;
if (isIE6) {
try {
document.execCommand("BackgroundImageCache", false, true)
} catch(e) {}
}
14、原生JavaScript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)
}
}
15、原生JavaScript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;
}
16、原生JavaScript清除脚本内容
function stripscript(s) {
return s.replace(/<script.*?>.*?<//script>/ig, '');
}
17、原生JavaScript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. = false;
scriptNode.onload = function () {
scriptNode. = true;
JSLOADED[src] = 1;
};
scriptNode.onreadystatechange = function () {
if((scriptNode.readyState == 'loaded' || scriptNode.readyState == 'complete') && !scriptNode. {
scriptNode. = true;
JSLOADED[src] = 1;
}
};
} else if(text){
scriptNode.text = text;
}
document.getElementsByTagName('head')[0].appendChild(scriptNode);
} catch(e) {}
}
18、原生JavaScript返回按ID检索的元素对象
function $(id) {
return !id ? null : document.getElementById(id);
}
19、原生JavaScript返回浏览器版本内容
function browserVersion(types) {
var other = 1;
for(i in types) {
var v = types[i] ? types[i] : i;
if(USERAGENT.indexOf(v) != -1) {
var re = new RegExp(v + '(///|//s)([//d//.]+)', 'ig');
var matches = re.exec(USERAGENT);
var ver = matches != null ? matches[2] : 0;
other = ver !== 0 && v != 'mozilla' ? 0 : other;
}else {
var ver = 0;
}
eval('BROWSER.' + i + '= ver');
}
BROWSER.other = other;
}
20、原生JavaScript元素显示的通用方法
function $(id) {
return !id ? null : document.getElementById(id);
}
function display(id) {
var obj = $(id);
if(obj.style.visibility) {
obj.style.visibility = obj.style.visibility == 'visible' ? 'hidden' : 'visible';
} else {
obj.style.display = obj.style.display == '' ? 'none' : '';
}
}
21、原生JavaScript中有insertBefore方法,可惜却没有insertAfter方法?用如下函数实现
function insertAfter(newChild,refChild){
var parElem=refChild.parentNode;
if(parElem.lastChild==refChild){
refChild.appendChild(newChild);
}else{
parElem.insertBefore(newChild,refChild.nextSibling);
}
}
22、原生JavaScript中兼容浏览器绑定元素事件
function addEventSamp(obj,evt,fn){
if (obj.addEventListener) {
obj.addEventListener(evt, fn, false);
}else if(obj.attachEvent){
obj.attachEvent('on'+evt,fn);
}
}
23、原生JavaScript光标停在文字的后面，文本框获得焦点时调用
function focusLast(){
var e = event.srcElement;
var r =e.createTextRange();
r.moveStart('character',e.value.length);
r.collapse(true);
r.select();
}
24、原生JavaScript检验URL链接是否有效
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);
}
}
}
25、原生JavaScript格式化CSS样式代码
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;
} | 