var http_request = false;
	var target_id = '';

	function makeRequest(url, parameters, callback)
	{
		http_request = false;
		if (window.XMLHttpRequest) // Mozilla, Safari,IE7+.
		{
			http_request = new XMLHttpRequest();
			if (http_request.overrideMimeType)
			{
				http_request.overrideMimeType('text/xml');
			}
		}
		else if (window.ActiveXObject) // IE 5, 6
		{
			try {
				http_request = new ActiveXObject("Msxml2.XMLHTTP");
			} catch (e) 
			{
				try {
					http_request = new ActiveXObject("Microsoft.XMLHTTP");
				} catch (e) {}
			}
		}
		if (!http_request) 
		{
			//alert('Cannot create XMLHTTP instance');
			return false;
		}
		http_request.onreadystatechange = callback;
		http_request.open('GET', url + parameters, true);
		http_request.send(null);
	}

	function retreiveSysVar()
	{
		if (http_request.readyState == 4)
		{
			if (http_request.status == 200)
			{
				document.getElementById(target_id).innerHTML = http_request.responseText;
			}
		}

				/*var xmldoc = http_request.responseXML;
				var root = xmldoc.getElementsByTagName('root').item(0);
				for (var iNode = 0; iNode < root.childNodes.length; iNode++) 
				{
					var node = root.childNodes.item(iNode);
					for (i = 0; i < node.childNodes.length; i++) 
					{
						var sibl = node.childNodes.item(i);
						var len = parseInt(sibl.childNodes.length / 2);
						var arr = new Array(len);
						var cnt = 0;
						for (x = 0; x < sibl.childNodes.length; x++) 
						{
							var sibl2 = sibl.childNodes.item(x);
							var sibl3;
							if (sibl2.childNodes.length > 0) 
							{
								sibl3 = sibl2.childNodes.item(0);
								arr[cnt] = sibl3.data;
								cnt++;
							}
						}
						addrow("mytable", arr);
					}
				}
			} else {
            alert('There was a problem with the request.');
         }
      }*/
	}

	function readSysVar(varname, into)
	{
		target_id = into;
		makeRequest('/sysvars.php', '?sysvar='+varname, retreiveSysVar);
	}