// stores the reference to the XMLHttpRequest object
var xmlHttp = createXmlHttpRequestObject();
// retrieves the XMLHttpRequest object
function createXmlHttpRequestObject()
{
	// will store the reference to the XMLHttpRequest object
	var xmlHttp;
	// if running Internet Explorer
	if(window.ActiveXObject)
	{
		try
		{
			xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
		}
		catch (e)
		{
			xmlHttp = false;
		}
	}
	// if running Mozilla or other browsers
	else
	{
		try
		{
			xmlHttp = new XMLHttpRequest();
		}
		catch (e)
		{
			xmlHttp = false;
		}
	}
	// return the created object or display an error message
	if (!xmlHttp)
	alert("Error creating the XMLHttpRequest object.");
	else
	return xmlHttp;
}
// make asynchronous HTTP request using the XMLHttpRequest object
function process(fid, cid)
{
	// proceed only if the xmlHttp object isn't busy
	if (xmlHttp.readyState == 4 || xmlHttp.readyState == 0)
	{
		// retrieve the name typed by the user on the form
		//name = encodeURIComponent(document.getElementById("myName").value);
		// execute the quickstart.php page from the server
		xmlHttp.open("GET", "getLargeImage.php?cid=" + cid +"&fid=" + fid, true);
		// define the method to handle server responses
		xmlHttp.onreadystatechange = handleServerResponse;
		// make the server request
		xmlHttp.send(null);
	}
	else
	{
		// if the connection is busy, try again after one second
		setTimeout('process()', 1000);
	}
}
//show YIM chat
function ShowYIM()
{
	// proceed only if the xmlHttp object isn't busy
	if (xmlHttp.readyState == 4 || xmlHttp.readyState == 0)
	{
		// retrieve the name typed by the user on the form
		//name = encodeURIComponent(document.getElementById("myName").value);
		// execute the quickstart.php page from the server
		xmlHttp.open("GET", "getYIM.php", true);
		// define the method to handle server responses
		xmlHttp.onreadystatechange = YIMResponse;
		// make the server request
		xmlHttp.send(null);
	}
	else
	{
		// if the connection is busy, try again after one second
		setTimeout('process()', 1000);
	}
}
// executed automatically when a message is received from the server
function handleServerResponse()
{
	// move forward only if the transaction has completed
	if (xmlHttp.readyState == 4)
	{
		// status of 200 indicates the transaction completed successfully
		if (xmlHttp.status == 200)
		{
			// extract the XML retrieved from the server
			xmlResponse = xmlHttp.responseText;
			// get the text message, which is in the first child of
			// update the client display using the data received from the server
			document.getElementById("diviImgLarge").innerHTML = "<div id='diviImgLarge' align='center'><img src='" + xmlResponse + "'/></div>";
			// restart sequence
			//setTimeout('process()', 1000);
		}
		// a HTTP status different than 200 signals an error
		else
		{
			alert("There was a problem accessing the server: " +
			xmlHttp.statusText);
		}
	}
}
//execute YIM response
function  YIMResponse()
{
	// move forward only if the transaction has completed
	if (xmlHttp.readyState == 4)
	{
		// status of 200 indicates the transaction completed successfully
		if (xmlHttp.status == 200)
		{
			// extract the XML retrieved from the server
			xmlResponse = xmlHttp.responseText;
			// get the text message, which is in the first child of
			// update the client display using the data received from the server
			var tdYIM = "<td id='tdiYIM'>";
			tdYIM += "<a href='ymsgr:sendim?"+ xmlResponse + "'>";			
			tdYIM += "<img src='http://opi.yahoo.com/online?u="+ xmlResponse +"&m=g&t=2' alt='i am not online' border='0' height='25' width='125' />";
			tdYIM += "</a></td>";
			
			document.getElementById("tdiYIM").innerHTML = xmlResponse;
			// restart sequence
			//setTimeout('process()', 1000);
		}
		// a HTTP status different than 200 signals an error
		else
		{
			alert("There was a problem accessing the server: " +
			xmlHttp.statusText);
		}
	}
}