javascript创建GUID

function NewGuid(bOrg){   try   {    var sGuid=new ActiveXObject('scriptlet.typelib').GUID   }    catch(e)   {     var sGuid=fGuidCst();   }      if(bOrg) return sGuid;   return (sGuid+'').replace(/\{|\}/g,'');      function fGuidCst()   {    var sGuid='';    for(var i=1; i<=32; i++)    {     var nNum=0;     nNum=parseInt(Math.random()*16);     sGuid+=nNum.toString(16);     if(i==8||i==12||i==16||i==20)sGuid+='-';    }    return '{'+sGuid.toUpperCase()+'}';   }}