var http_request = false;

function makeobj()
{
http_request = false;
      if (window.XMLHttpRequest) 
	  { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) 
		 {
         	// set type accordingly to anticipated content type
            //http_request.overrideMimeType('text/xml');
            http_request.overrideMimeType('text/html');
         }
      } 
	  else if (window.ActiveXObject) 
	  { // IE
         try 
		 {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) 
		 {
            try 
			{
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
         }
      }
      if (!http_request) {
         alert('Cannot create XMLHTTP instance');
         return false;
      }
}
function hwk_login(obj) 
   {
      var poststr = "username=" + encodeURI( document.getElementById("user_name").value ) +
                    "&password=" + encodeURI( document.getElementById("password").value );
      makePOSTRequest('hawkeye/login.php', poststr);
   }
   function makePOSTRequest(url, parameters) 
   {
      
      makeobj();
      http_request.onreadystatechange = alertLoginContents;
      http_request.open('POST', url, true);
      http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      http_request.setRequestHeader("Content-length", parameters.length);
      http_request.setRequestHeader("Connection", "close");
      http_request.send(parameters);
   }

   function alertLoginContents() 
   {
	   if(http_request.readyState != 4) 
	   {
		 document.getElementById("status").style.visibility="visible";
		}

      if (http_request.readyState == 4) 
	  {
         if (http_request.status == 200) 
		 {
			var result = http_request.responseText;
			document.getElementById("status").innerHTML=result;
         } else 
		 {
            alert('Internal Server Error: Login');
         }
      }
   }