javascript技巧整理(2)
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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IE6var 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.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) {}}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' : '';}}