var trequest = null;

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

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

   function tgetCost() {
    
     tcreateRequest();
	 var c = document.getElementById("tcostnumber"); 
	 val=c.value;
     var url = "costcalculator.php?val=" + val;
     trequest.open("GET", url, true);
     trequest.onreadystatechange = tupdateCost;
     trequest.send(null);
  }

    function tupdateCost() {
      if (trequest.readyState == 4) {
      var newTotal = trequest.responseText;
	  String(newTotal);
	  var numbers =newTotal.split("qwe");
	  var tcost = document.getElementById("tcost");
	  tcost.value="";
	 var tdescription = document.getElementById("tdescription");
	tdescription.value="";
	
	tcost.value=numbers[0];
	tdescription.value=" "+numbers[1];
	 }}
	 
	 function tremoveCost() {
     
	  var tcostnumber = document.getElementById("tcostnumber"); 
	  var tcost = document.getElementById("tcost");
      var tdescription = document.getElementById("tdescription");	  
	  tcostnumber.value="";
	  tcost.value="";
      tdescription.value="";
  }
	 
	 

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