secret = "";
url = "";
option = "";
step = 0;
feedback = "";

function convert(step)
{
	disable_all();

	if(step == null || step == "0")
	{
		//Clearing all element first//
		step = 0;		
		document.getElementById("dynamic_process").innerHTML = "";

		secret = "c68412dbfb9ffdf803bd9765d7bae536";
		url = document.getElementById('url').value;
		option = document.getElementById('option').value;
		document.getElementById('process').style.display="block";
		document.getElementById("converter_status").innerHTML = "<img src='template/images/retrieving_info.jpg' /><br><font style='color:#1c1c75;'>Retrieving video info..</font><br><font style='color:#f86005'>Please do not close your browser or navigate away from this page<br><img src='template/images/progress.gif' /></font>";

		retrieveURL("ajax/converter/retrieve_video_info.php" ,url, option, secret, step);
	}
	else
	{
		switch(step)
		{
			case 1:
				retrieveURL_2("ajax/converter/download_video.php" ,url, option, secret, step);
				document.getElementById("converter_status").innerHTML = "<img src='template/images/downloading_video.jpg' /><br><font style='color:#1c1c75;'>Downloading the video..</font><br><font style='color:#f86005'>Please do not close your browser or navigate away from this page<br><img src='template/images/progress.gif' /></font>";
				break;
			case 2:
				retrieveURL_2("ajax/converter/convert_video.php" ,url, option, secret, step);
				document.getElementById("converter_status").innerHTML = "<img src='template/images/converting_video.jpg' /><br><font style='color:#1c1c75;'>Converting the video..</font><br><font style='color:#f86005'>Please do not close your browser or navigate away from this page<br><img src='template/images/progress.gif' /></font>";
				break;
			case 3:
				final_convert(feedback);
				document.getElementById("converter_status").innerHTML = "<img src='template/images/completed.jpg' /><br><font style='color:#1c1c75;'>Request completed!</font>";
				break;	
		}
	}

}

function disable_all()
{
	document.getElementById('url').disabled = true;
	document.getElementById('option').disabled = true;
	document.getElementById('submit_button').disabled = true;
}

function enable_all()
{
	document.getElementById('url').disabled = false;
	document.getElementById('option').disabled = false;
	document.getElementById('submit_button').disabled = false;
}

function retrieveURL(file, url, option, secret, step)
{
	params="secret="+secret+"&url="+url+"&option="+option+"&feedback="+feedback;
	if (window.XMLHttpRequest)
	{ // Non-IE browsers
		req = new XMLHttpRequest();
	}
	else if (window.ActiveXObject)
	{ // IE
		req = new ActiveXObject("Microsoft.XMLHTTP");
	}
	if (req)
	{
		//Define "callback" function
		req.onreadystatechange = processStateChange;
		try
		{
			req.open("POST", file, true);

			//Send the proper header information along with the request
			req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
			req.setRequestHeader("Content-length", params.length);
			req.setRequestHeader("Connection", "close");

			req.send(params);
		}
		catch (e)
		{
			alert(e);
		}
	}
	else
	{
		document.getElementById("dynamic_process").innerHTML = "XMLHTTPRequest not supported";
	}
}

function processStateChange()
{
	switch (req.readyState)
	{	
		case 1:			
			break;
		case 2:
			break;
		case 3:
			break;
		case 4:			
			if (req.status == 200)
			{ // OK response
				document.getElementById("dynamic_process").innerHTML += req.responseText;
				if(req.responseText == "Invalid URL")
				{
					enable_all();	
					document.getElementById("converter_status").innerHTML = "";
					break;
				}
				step++;
				convert(step);
			}
			else
			{
				alert("Problem: " + req.statusText);
				enable_all();
			}
			break;
			
	}
}

function retrieveURL_2(file, url, option, secret, step)
{
	params="secret="+secret+"&url="+url+"&option="+option+"&feedback="+feedback;
	if (window.XMLHttpRequest)
	{ // Non-IE browsers
		req = new XMLHttpRequest();
	}
	else if (window.ActiveXObject)
	{ // IE
		req = new ActiveXObject("Microsoft.XMLHTTP");
	}
	if (req)
	{
		//Define "callback" function
		req.onreadystatechange = processStateChange_2;
		try
		{
			req.open("POST", file, true);

			//Send the proper header information along with the request
			req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
			req.setRequestHeader("Content-length", params.length);
			req.setRequestHeader("Connection", "close");

			req.send(params);
		}
		catch (e)
		{
			alert(e);
		}
	}
	else
	{
		document.getElementById("dynamic_process").innerHTML = "XMLHTTPRequest not supported";
		enable_all();
	}
}

function processStateChange_2()
{
	switch (req.readyState)
	{	
		case 1:			
			break;
		case 2:
			break;
		case 3:
			break;
		case 4:			
			if (req.status == 200)
			{ // OK response
				feedback = req.responseText;
				step++;
				convert(step);
			}
			else
			{
				alert("Problem: " + req.statusText);
				enable_all();
			}
			break;
	}
}

function final_convert(feedback)
{
	document.getElementById("dynamic_process").innerHTML += feedback;
	document.getElementById('url').value = "";	//clear the url
	step = 0;
	enable_all();
	frames["ad_frame"].window.location.reload();
}