var request;
function sendChecked(scheckbox)
{
    if (scheckbox)
    {
   
    if (request )
    request.abort();
   
        if(window.ActiveXObject)
        {
            request=new ActiveXObject ("Microsoft.XMLHTTP");
        }
        else if(window.XMLHttpRequest)
        {
            request =new XMLHttpRequest();
        }
        var nowtime=new Date();
        request.open("GET","setProductId.aspx?codeId="+scheckbox.value+"&checked="+scheckbox.checked+"&t="+nowtime.getTime(),true)
 
        request.onreadystatechange=function ()
        {
//        if(request.readyState ==4&&request.status ==200) {
//        alert(request.responseText .toString());
//        }
        
        };
       // request.send("codeId="+scheckbox.value+"&checked="+scheckbox.checked);
       request.send(null);
      
    }
}