var request = null;

   function createRequest() {
     try {
       request = new XMLHttpRequest();
     } catch (trymicrosoft) {
       try {
         request = new ActiveXObject("Msxml2.XMLHTTP");
       } catch (othermicrosoft) {
         try {
           request = new ActiveXObject("Microsoft.XMLHTTP");
         } catch (failed) {
           request = null;
         }
       }
     }

     if (request == null)
       alert("Error creating request object!");
   }

   function getCost() {
    
     createRequest();
	 var c = document.getElementById("calc_t_input"); 
	  val=c.value;
     var url = "costcalculator.php?val=" + val;
     request.open("GET", url, true);
     request.onreadystatechange = updateCost;
     request.send(null);
  }

    function updateCost() {
      if (request.readyState == 4) {
      var newTotal = request.responseText;
	  String(newTotal);
	  var numbers =newTotal.split("qwe");
	  var cost = document.getElementById("calc_t_return");
	 cost.innerHTML="";
	
	cost.innerHTML=numbers[0];
	 }}