Several js methods about HTML

// Add to the favorite function addBookmark (title) {var url = parent. location. href; if (window. sidebar) {window. sidebar. addPanel (title, url, "");} else if (document. all) {window. external. addFavorite (url, title);} else if (window. opera & window. print) {return true ;}/// set the Home Page function setHome (obj, vrl) {try {obj. style. behavior = 'url (# default # homepage) '; obj. setHomePage (vrl);} catch (e) {if (window. netscape) {try {netsca Pe. security. PrivilegeManager. enablePrivilege ("UniversalXPConnect");} catch (e) {alert ("Sorry! Your browser does not support direct homepage setting. Enter "about: config" in the address bar of your browser and press enter to [signed. applets. codebase_principal_support] is set to "true". Click "add to Favorites" and ignore the security prompt. The setting is successful. ");} Var prefs = Components. classes ['@ mozilla.org/preferences-service%1'%.getservice (Components. interfaces. nsIPrefBranch); prefs. setCharPref ('browser. startup. homepage ', vrl) ;}} var MY = new Object (); // The Cookie reading function MY. cookie = {set: function (name, value, expires, path, domain) {if (typeof expires = "undefined") {expires = new Date (). getTime () + 24*3600*1000);} document. cookie = name + "=" + decodeURI (value) + (exp Ires )? "; Expires =" + expires. toGMTString (): "") + (path )? "; Path =" + path: "; path =/") + (domain )? "; Domain =" + domain: "") ;}, get: function (name) {var arr = document. cookie. match (new RegExp ("(^ |)" + name + "= ([^;] *) (; | $)"); if (arr! = Null) {return decodeURIComponent (arr [2]);} return null ;}, clear: function (name, path, domain) {if (this. get (name) {document. cookie = name + "=" + (path )? "; Path =" + path: "; path =/") + (domain )? "; Domain =" + domain: "") + "; expires = Fri, 02-Jan-1970 00:00:00 GMT ";}}}; // function limitImage (ImgD, areaWidth, areaHeight) {var flag = false; if (! AreaWidth) {areaWidth = 600; // The width of the image area.} If (! AreaWidth) {areaHeight = 450; // The height of the image area.} Var image = new Image (); try {image. src = ImgD. src; if (image. width> 0 & image. height> 0) {flag = true; if (image. width/image. height> = areaWidth/areaHeight) {if (image. width> areaWidth) {ImgD. width = areaWidth; ImgD. height = (image. height * areaWidth)/image. width;} else {ImgD. width = image. width; ImgD. height = image. height ;}} else {if (image. height> areaHeight) {ImgD. height = areaHeight; ImgD. width = (image. wid Th * areaHeight)/image. height;} else {ImgD. width = image. width; ImgD. height = image. height ;}}} catch (e) {// nothing }}// copy to clipboard function copyCodes (ele) {if (copy2Clipboard (ele )! = False) {alert ("the generated code has been copied to the clipboard. You can use Ctrl + V to paste it to the desired place! ") ;}}// Copy to clipboard function copyCode () {var testCode =" "; testCode + = document. title + ''+ this. location. href; if (copy2Clipboard (testCode )! = False) {alert ("the generated code has been copied to the clipboard. You can use Ctrl + V to paste it to the desired place! ") ;}} Copy2Clipboard = function (txt) {if (window. clipboardData) {window. clipboardData. clearData (); window. clipboardData. setData ("Text", txt);} else if (navigator. userAgent. indexOf ("Opera ")! =-1) {window. location = txt;} else if (window. netscape) {try {netscape. security. privilegeManager. enablePrivilege ("UniversalXPConnect");} catch (e) {alert ("your firefox security restrictions limit you to perform clipboard operations. Open 'about: config' and set signed. applets. codebase_principal_support 'is set to true and then try again. The relative path is the firefox root directory/greprefs/all. js "); return false;} var clip = Components. classes ['@ mozilla.org/widget/clipboard1_1').createinstance (Components. interfaces. NsIClipboard); if (! Clip) return; var trans = Components. classes ['@ mozilla.org/widget/transferable1_1'assist.createinstance (Components. interfaces. nsITransferable); if (! Trans) return; trans. addDataFlavor ('text/unicode '); var str = new Object (); var len = new Object (); var str = Components. classes ["@ mozilla.org/supports-string1_1"]. createInstance (Components. interfaces. nsISupportsString); var copytext = txt; str. data = copytext; trans. setTransferData ("text/unicode", str, copytext. length * 2); var clipid = Components. interfaces. nsIClipboard; if (! Clip) return false; clip. setData (trans, null, clipid. kGlobalClipboard) ;}}/*** get url parameter */function getUrlParam (paramName) {var returnVal = ""; try {var paramUrl = window. location. search; // processing length if (paramUrl. length> 0) {paramUrl = paramUrl. substring (1, paramUrl. length); var paramUrlArray = paramUrl. split ("&"); for (var I = 0; I