新聞中心
這里有您想知道的互聯(lián)網(wǎng)營銷解決方案
原生JavaScript技巧大收集100(上)
1、原生JavaScript實現(xiàn)字符串長度截取

成都創(chuàng)新互聯(lián)長期為成百上千家客戶提供的網(wǎng)站建設(shè)服務(wù),團隊從業(yè)經(jīng)驗10年,關(guān)注不同地域、不同群體,并針對不同對象提供差異化的產(chǎn)品和服務(wù);打造開放共贏平臺,與合作伙伴共同營造健康的互聯(lián)網(wǎng)生態(tài)環(huán)境。為古塔企業(yè)提供專業(yè)的網(wǎng)站制作、成都網(wǎng)站制作,古塔網(wǎng)站改版等技術(shù)服務(wù)。擁有10多年豐富建站經(jīng)驗和眾多成功案例,為您定制開發(fā)。
- 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獲取域名主機
- 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, "$1")
- }
4、原生JavaScript替換全部
- String.prototype.replaceAll = function(s1, s2) {
- return this.replace(new RegExp(s1, "gm"), s2)
- }
5、原生JavaScript轉(zhuǎn)義html標簽
- function HtmlEncode(text) {
- return text.replace(/&/g, '&').replace(/\"/g, '"').replace(//g, '>')
- }
7、原生JavaScript時間日期格式轉(zhuǎn)換
- Date.prototype.Format = function(formatStr) {
- var str = formatStr;
- var Week = ['日', '一', '二', '三', '四', '五', '六'];
- str = str.replace(/yyyy|YYYY/, this.getFullYear());
- str = str.replace(/yy|YY/, (this.getYear() % 100) > 9 ? (this.getYear() % 100).toString() : '0' + (this.getYear() % 100));
- str = str.replace(/MM/, (this.getMonth() + 1) > 9 ? (this.getMonth() + 1).toString() : '0' + (this.getMonth() + 1));
- str = str.replace(/M/g, (this.getMonth() + 1));
- str = str.replace(/w|W/g, Week[this.getDay()]);
- str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : '0' + this.getDate());
- str = str.replace(/d|D/g, this.getDate());
- str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : '0' + this.getHours());
- str = str.replace(/h|H/g, this.getHours());
- str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : '0' + this.getMinutes());
- str = str.replace(/m/g, this.getMinutes());
- str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : '0' + this.getSeconds());
- str = str.replace(/s|S/g, this.getSeconds());
- return str
- }
8、原生JavaScript判斷是否為數(shù)字類型
- function isDigit(value) {
- var patrn = /^[0-9]*$/;
- if (patrn.exec(value) == null || value == "") {
- return false
- } else {
- return true
- }
- }
9、原生JavaScript設(shè)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獲取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加入收藏夾
- function AddFavorite(sURL, sTitle) {
- try {
- window.external.addFavorite(sURL, sTitle)
- } catch(e) {
- try {
- window.sidebar.addPanel(sTitle, sURL, "")
- } catch(e) {
- alert("加入收藏失敗,請使用Ctrl+D進行添加")
- }
- }
- }
12、原生JavaScript設(shè)為首頁
- 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("該操作被瀏覽器拒絕,如果想啟用該功能,請在地址欄內(nèi)輸入 about:config,然后將項 signed.applets.codebase_principal_support 值該為true")
- }
- }
- var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch);
- prefs.setCharPref('browser.startup.homepage', 'http://www.jq-school.com')
- }
- }
#p#
13、原生JavaScript判斷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加載樣式文件
- 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返回腳本內(nèi)容
- function evalscript(s) {
- if(s.indexOf('


咨詢
建站咨詢