function RequestValue(url) {
	
	  var req = createRequest();
	
	  // code to prevent caching
	  var d = new Date();
	
	  // set up request parameters - uses GET method
	  req.open('GET',url+'&code='+d.getTime(),false);
	
	  // submit to the server for processing
	  req.send(null);
	
	  // process returned data - error condition
	  if (req.status != 200) {
		
		alert('Problem with Request');
		return "";
	  }
	
	  // process returned data - OK
	  else {
		return req.responseText;
	  }
	
	}

function createRequest() {
	  var request;
	  try {
		request = new XMLHttpRequest();
	  }
	  catch (tryIE) {
		try {
		  request = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (tryOlderIE) {
		  try {
			request = new ActiveXObject("Microsoft.XMLHTTP");
		  }
		  catch (failed) {
			alert("Error creating XMLHttpRequest");
		  }
		}
	  }
	  return request;
	}