function IsInstallQQ(){
        	
		try{//支持
			var xmlhttp=new ActiveXObject("TimwpDll.TimwpCheck");	
		  	return true;			
		}catch(e){//不支持
		
			location.href='http://is.qq.com/webpresence/up_alarm.shtml';
			//window.open('http://is.qq.com/webpresence/up_alarm.htm','','toolbar=no,location=no,directories=no,status=no,menubar=no, scrollbars=yes,resizable=no,copyhistory=no,width=410, height=410,top=0,left=0')
			return false;
		}
		return false;
	}
	  
	 function IsInstallSupMiniQQ(){
        	
		try{//支持			
			var xmlhttp=new ActiveXObject("TimwpDll.TimwpCheck");
			var  n = xmlhttp.GetVersion();	
			if (n < 2.1)
			{
				location.href='http://is.qq.com/up_alarm.shtml';			
				return false;
			}
		    return true;			
		}catch(e){//不支持
		
			location.href='http://is.qq.com/up_alarm.shtml';			
			return false;
		}
		return false;
	}