function sendRequest(){

$.ajax({
			type: "POST",
			url: "postcode.php",
			data: 	"postcode=" + document.getElementById("postcode").value,
			success: function(html){
				$("#show").html(html);
			}
		});
		
		}


			
			
		
function submitenter(myfield,e)
{
var keycode;
if (window.event) keycode = window.event.keyCode;
else if (e) keycode = e.which;
else return true;

if (keycode == 13)
   {
   sendRequest()
   return false;
   }
else
   return true;
}