function clearForm()
		{
			// Clears the form and coloured text area on form
			document.getElementById('phpCode').value = "";
			document.getElementById('phpCodeArea').innerHTML = "";			
		}
		
		function testTxtArea()
		{
			// Ensures data is available for processing and calls function to process
			if(document.getElementById('phpCode').value)
			{
				colourCode();
			}
			
			return false;
			
		}
		
		function colourCode()
		{
			// Set up AJAX
			if (window.XMLHttpRequest)
			{
				// Mozilla version
				ajax = new XMLHttpRequest();
			}
			else if (window.ActiveXObject)
			{
				// IE version
				ajax = new ActiveXObject("Microsoft.XMLHTTP");
			}

			// Get data from form
			var phpCode = document.getElementById('phpCode').value;
			var inline = document.getElementById('inline').checked;		
			
			if(inline)
			{
				var style = "inline";
			}
			else
			{
				var style = "styleSheet";
			}
					
			// Prepare data for posting to server
			var sendData = style + ";" + phpCode; 
			var sendData = encodeURIComponent(sendData);

			// Send data
			ajax.open("POST","colouredCodeInterface.php");
			ajax.setRequestHeader('Content-Type', 
				'application/x-www-form-urlencoded; charset=UTF-8');
			ajax.send(sendData);

			// Test for response and recieve returned data
			ajax.onreadystatechange=function()
			{
				if (ajax.readyState==4)
				{
					// Send to screen
					var phpCode = document.getElementById('phpCodeArea');
					phpCode.innerHTML = ajax.responseText;
				}
			}
			
		}
		
		function addData()
		{
			// Adds demo data for demonstration
			document.getElementById('phpCode').value 
				= "function test($name) { echo \"Hello there \" . $name; }";
		}