function cleanElement(id)
{
	element = document.getElementById(id);
	if(element != null)
	{
		element.innerHTML = "";
	}
}

function saveFeedback()
	{
		text = document.getElementById("txtText").value;
		if(text == "") return;		
		// IE
		if(window.ActiveXObject)
		{
			try
			{
				xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {
				xmlHttp = false;
			}
	
		} else {
			// other
			try
			{
				xmlHttp = new XMLHttpRequest();
			} catch (e) {
				xmlHttp = false;
			}
		}
	
		param = "";
	
		param += 'btnSaveFeedback=true&';
		param += 'txtText=' + text;	
		
		document.getElementById("divFeedbackForm").innerHTML = "<img src=\"img/ajax/loader-small.gif\" />";
	
		xmlHttp.onreadystatechange = feedbackSaved;
		xmlHttp.open("POST", "func/save_feedback.php"+'?'+Math.random(), true);
		
		xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		xmlHttp.setRequestHeader("Content-length", param.length);
		xmlHttp.setRequestHeader("Connection", "close");
		
		// make the server request
		xmlHttp.send(param);
	}
	
	function feedbackSaved()
	{
		try{
			if(xmlHttp.responseText != "")
			{
				xmlResponse = xmlHttp.responseText;
				document.getElementById("divFeedbackForm").innerHTML = '' + xmlResponse + '';
			}
		} catch (e) {
			// alert(e);
		}
	}