function testData() 
	{
		//calls the xml request in a loop based on the current sources                
		var source = ['Mrk 421','Mrk 501'];
		for (i = 0; i<source.length; i++) {
			testXMLData(i, source);
		}
	}

	function testXMLData(index, source) 
	{
		var testXML;
		testXML = new XMLHttpRequest();
		//NOTE: previous errors on the request was caused by appending "http://www.fact-project.org"
		testXML.open("GET","/smartfact/index.php?source="+escape(source[index])+"&time="+year+"-"+month+"-"+day,true);
		dataSource = new Array();
		testXML.onload=function() {
			if (testXML.status==200)
			{
				line=testXML.responseText.split('\n');
				dataSource.push(line);
				if (dataSource.length == source.length)
					displayXMLData(dataSource, source); //this will be called when the last data from the list is read
			}
		testXML.send();
	}

	function displayXMLData(dataSource, source)
	{
		//This function splits the lines of data per data source
		var dataGraph = new Array(source.length); 
		for (i=0; i<source.length; i++) {
			dataGraph[i] = new Array(); //dataGraph contains the individual points for each source i
			for(row=0;row<dataSource[i].length;row++)
			{
				rows=line[row].split(',');
				dataGraph[i].push(rows[4]);
				$('#data').append(i + ' GRAPH DATA ' + dataGraph[i]);
			}
		}
	}