function downMC()
{
	var url="/count_mm.php";
	ajax.open("POST",url,true);
	ajax.setRequestHeader("Content-Type","application/x-www-form-urlencoded;");
	ajax.onreadystatechange=function()
	{
		if(  ajax.readyState==4 && ajax.status == 200 )
		{

		}
	}
	ajax.send("tt=395483511");
}