/**********************************************************************/
/****************************AJAX**************************************/
/**********************************************************************/

function makeRequest(url, handler)
{
	http_request = false;
	
	if (window.XMLHttpRequest)
	{
		// IE7, Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType)
		{
			http_request.overrideMimeType('text/html');
		}
	}
	else if (window.ActiveXObject)
	{ // IE
		try
		{
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			try
			{
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e)
			{}
		}
	}
	
	if (!http_request)
	{
		alert('Your browser is obsolete! Please update it!'); //impossibile creare l'istanza XMLHTTP
		return false;
	}
	
	http_request.onreadystatechange = handler;
	http_request.open('GET', url, true);
	http_request.setRequestHeader("connection", "close");
	http_request.send(null);

}
/************************************************************************************************/
/************************************************************************************************/
/************************************************************************************************/

function eventRefreshCaptcha()
{
	if (http_request.readyState == 4)
	{
	
		if (http_request.status == 200)
		{
			document.getElementById("div_captcha").innerHTML = http_request.responseText;
		}
		else
		{
			alert('Internal server error\n\n Request Status: ' + http_request.status );
		}
	}
}

function RefreshCaptcha()
{
	document.feedback.captcha.value='';
	document.getElementById("div_captcha").innerHTML = "<h3><img src=\"img/loading.gif\" border=\"0\" align=\"absmiddle\"> Loading...</h3>";
	makeRequest("ajax/wrapper.php?act=captcha",eventRefreshCaptcha);
}

function eventCheckCaptcha()
{
	if (http_request.readyState == 4)
	{
		//alert(http_request.status+'  '+http_request.responseText);
		
		if (http_request.status == 200)
		{
			if(http_request.responseText=="<s>KO</s>")
			{
				document.feedback.captcha.value='';
				alert("You have entered an invalid code!!!");
				RefreshCaptcha();
			}
			else
			if(http_request.responseText=="<s>OK</s>")
			{
				document.feedback.c_s.value="1";
				document.feedback.submit();
			}
		}
		else
		{
			alert('Internal server error\n\n Request Status: ' + http_request.status );
		}
	}
}

function CheckCaptcha(val)
{
	makeRequest("ajax/wrapper.php?act=check_captcha&v="+val,eventCheckCaptcha);
}

function CheckFeedback()
{
var frm;
	frm = document.feedback;
	
	if(frm.feedback.value=='')
	{
		alert("Please write a feedback!");
		return false;
	}
	
	/*if(frm.captcha.value=='')
	{
		alert("Please enter a validation code!");
		return false;
	}
	
	if(frm.c_s.value=="1")		
		return true;
	
	CheckCaptcha(frm.captcha.value);
		
return false;
*/
return true;
}


function eventRefreshResults()
{
	if (http_request.readyState == 4)
	{
		if (http_request.status == 200)
		{
			div=document.getElementById("div_suggest");
			div.style.display = "";
			div.innerHTML = http_request.responseText;
		}
	}
}