js复制代码(IE/Firefox/NS)

/**
*JS复制代码
*/
function copyData(text){
var clipBoardContent,clip,trans,str,len,str,copytext,clipid;
clipBoardContent = text;
if(window.clipboardData){
   window.clipboardData.clearData();
   window.clipboardData.setData("Text", clipBoardContent);
}
else if(navigator.userAgent.indexOf("Opera") != -1){
   window.location = clipBoardContent;
}
else if (window.netscape){
   try{
    netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
   }catch (e){
    alert("您的当前浏览器设置已关闭此功能!请按以下步骤开启此功能!\n新开一个浏览器,在浏览器地址栏输入'about:config'并回车。\n然后找到'signed.applets.codebase_principal_support'项,双击后设置为'true'。\n声明:本功能不会危极您计算机或数据的安全!");
   }
   clip = Components.classes['@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard);
   if (!clip) return;
   trans = Components.classes['@mozilla.org/widget/transferable;1'].createInstance(Components.interfaces.nsITransferable);
   if (!trans) return;
   trans.addDataFlavor('text/unicode');
   str = new Object();
   len = new Object();
   str = Components.classes["@mozilla.org/supports-string;1"].createInstance(Components.interfaces.nsISupportsString);
   copytext = clipBoardContent;
   str.data = copytext;
   trans.setTransferData("text/unicode",str,copytext.length*2);
   clipid = Components.interfaces.nsIClipboard;
   if (!clip) return false;
   clip.setData(trans,null,clipid.kGlobalClipboard);
}
return true;
}