Ajax Post XMLHttpRequest take long time

[Immunity18]

hello i dont know where i had to post this I have a postonly.html page which send a "POST" xmlhttprequest at register.php my problem is while query is complete (and table is updated) extremly fast(1-2 sec) as i can see my database via Putty.exe Responce of the if(http.readyState == 4 && http.status == 200) { alert(http.responseText); } is takes about 15 sec (so the alert box pop up) anyone knows any suggestion so it would be response faster? (my get method Ajax works fine and fast)

    Customer Account Information 
     
	function postForm()
	{
		//var httppost = new getHTTPObject(); 
		var url2 = "register2.php";
		var params = "account=testisok&email=yeah";

		http.open("POST", url2, true);

		//Send the proper header information along with the request
		http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		http.setRequestHeader("Content-length", params.length);
		http.setRequestHeader("Connection", "close");
		
		http.send(params);
		http.onreadystatechange = function() 
		{
			
			if(http.readyState == 4 && http.status == 200) 
			{
				alert(http.responseText);
			}
		}		

	}

function getHTTPObject() { 
  var xmlhttp; 

  if(window.XMLHttpRequest){ 
    xmlhttp = new XMLHttpRequest(); 
  } 
  else if (window.ActiveXObject){ 
    xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); 
    if (!xmlhttp){ 
        xmlhttp=new ActiveXObject("Msxml2.XMLHTTP"); 
    } 
    
} 
  return xmlhttp; 

  
} 
var http = getHTTPObject(); // We create the HTTP Object 
 
 
 
    Enter customer ID number to retrieve information: 
    Account: 
    E-mail :