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function copy(text){
     if(window.clipboardData){//判斷是否具有clipboardData對象，IE
         window.clipboardData.setData("Text",text);
     }else if(window.netscape){//判斷是否存在netscape對象，FF
         try{//用try來(lái)嘗試使用對象
             netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
         }catch(e){//如果不能使用剪貼板，提示用戶(hù)出錯
             alert(‘您的firefox安全限制限制您進(jìn)行剪貼板操作。\n請打開(kāi) "about:config" 將signed.applets.codebase_principal_support "設置為true" 之后重試‘);
             return false;
         }
         var clip,trans,str={},clipid;
         if(!(clip=Components.classes["@mozilla.org/widget/clipboard;1"].createInstance(Components.interfaces.nsIClipboard))) return;
         if(!(trans=Components.classes["@mozilla.org/widget/transferable;1"].createInstance(Components.interfaces.nsITransferable))) return;
         trans.addDataFlavor("text/unicode");
         str=Components.classes["@mozilla.org/supports-string;1"].createInstance(Components.interfaces.nsISupportsString);
         str.data=text;
         trans.setTransferData("text/unicode",str,text.length*2);
         clipid=Components.interfaces.nsIClipboard;
         try{
             clip.setData(trans,null,clipid.kGlobalClipboard);
         }catch(e){return false}
     }
}

function addBookmark(title,url){
     if(window.sidebar){//判斷是否具有sidebar對象，FF
         try{//如果url不是以http://或者ftp://或者https://開(kāi)頭的，會(huì )出錯
             window.sidebar.addPanel(title,url,"");
         }catch(e){}
     }else if(window.external.AddFavorite){//判斷是否具有AddFavorite方法，IE
         window.external.AddFavorite(url,title);
     }
}