把内容复制到剪贴板(兼容FF 2.0 ,IE7)

今天修改项目的时候,要用到发表评论时,把内容复制到剪贴板. 在网上找了一段,在FF2.0 和IE7 下面能用.

 

   function copyToClipboard(maintext)
   {
       if (window.clipboardData)
       {
       window.clipboardData.setData("Text", maintext);
       }
       else if (window.netscape)
       {
           try 
           {        
                  netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");        
            }
            catch(e)
            {        return false;
                    //alert("被浏览器拒绝！");
            }   


           var clip = Components.classes['@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard);
           if (!clip) 
               return;
           var trans = Components.classes['@mozilla.org/widget/transferable;1'].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-string;1"].createInstance(Components.interfaces.nsISupportsString);
           var copytext=maintext;
           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);
       }
       //alert("以下内容已经复制到剪贴板\n\n" + maintext);
       return false;
   }