Ajax Checkbox onChange problem

[JeremyA]

I am having a problem with the following code.  I have successfully loaded some of my php files based on the users selection.  However on the checkbox options I am having trouble.  When a user clicks on newphone or newcomputer it loads their respective .php files.  However if either one of the checkboxes are selected I want it to load a building.php file.  The code below works because of the alert which triggers the xmlhttp.status of = 200.  If the alert is not in there the call fails because the xmlhttp.status is not set.  Maybe I am looking at this problem all wrong.

 

  //Create a boolean variable to check for a valid Internet Explorer instance.
  var xmlhttp = false;
  var NewComputer = false;
  var NewPhone = false;

  //Check if we are using IE.
  try {
    //If the Javascript version is greater than 5.
    xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
    //alert ("IE for reals?  Upgrade please!");
  } catch (e) {
    //If not, then use the older active x object.
    try {
      //If we are using Internet Explorer.
      xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
      //alert ("IE for reals?  Upgrade please!");
    } catch (E) {
      //Else we must be using a non-IE browser.
      xmlhttp = false;
    }
  }

  //If we are using a non-IE browser, create a javascript instance of the object.
  if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
    xmlhttp = new XMLHttpRequest();
    //alert ("You are not using Microsoft Internet Explorer");
  }

  function MakeRequest(ServerPage, objID) {

    var obj = document.getElementById(objID);
    xmlhttp.open("GET", ServerPage);
    xmlhttp.onreadystatechange = function() {
      if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
        obj.innerHTML = xmlhttp.responseText;
      }
    }
    xmlhttp.send(null)
  }
	function EvaluateNeedsPhone(MyForm){

	if (MyForm.NeedsPhone.checked){
			MakeRequest('New Phone.php','3');
			NewPhone = true;

		}
		else{
			MakeRequest('BlankPage.html','3');
			NewPhone = false; 		
		}
		LoadBuilding();
	}


	function EvaluateNeedsComputer(MyForm){


	if (MyForm.NeedsComputer.checked){
			NewComputer = true;
			MakeRequest('New Computer.php','2');
		}

		else{
			//This will remove area's that are deselected
			NewComputer = false;
			MakeRequest('BlankPage.html','2');
		}
		LoadBuilding();
	}

	function LoadBuilding(){


		if (NewPhone == true || NewComputer == true){
    		alert("Please fill out the building");
    		MakeRequest('Building.php','4');
		}
		else{
			alert("You no longer need to fill out your building");
			MakeRequest('BlankPage.html','4');
		}
	}

[JeremyA]

Here are some more of the files.  Thanks in advance for your help.

 

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