function dingyue(username){

       try{
			xmlhttp=new ActiveXObject('Microsoft.XMLHTTP');
		}catch(e){
			try{
				xmlhttp=new ActiveXObject('Msxml2.XMLHTTP');
			}catch(e){
				try{
					xmlhttp=new XMLHttpRequest();
				}catch(e){
					alert(e);
				}
			}
		}
	      xmlhttp.open("post","/TbSubscribeAction.do?method=dingyueajax&username="+username);
		  xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
		  xmlhttp.onreadystatechange=function(){
          if(xmlhttp.readyState==4)
          { 
          
             if(xmlhttp.status == 200)
             {               
                xmlObject=xmlhttp.responseText;    
				alert(xmlObject);
				if("8折优惠"==xmlObject)	
				{
				dingyueid.innerHTML='<font color="green" size="2">'+xmlObject+'</font>'
				
				}
				else
				{	
				dingyueid.innerHTML='<font color="red" size="2">'+xmlObject+'</font>'
               	}
             }
             else
             {
                alert("没有连接成功");
             }
          }
        
        }
        //document.forms[0].optCity.focus();
		xmlhttp.send(null);
}