//Javascript for getting the random banner image

function createAjaxRequest()
{
	var request;
	
	try
	{
		request = new XMLHttpRequest();
	} 
	catch(trymicrosoft)
	{
		try
		{
			request = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch(othermicrosoft)
		{
			try
			{
				request = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch(failed) 
			{
				request = false;
			}
		 }
	}
	
	return request;
}

function setImage()
{
	var url = "http://www.rowan.edu/open/colleges/engineering/js/random_image.php";
	
	var request = createAjaxRequest();
	request.open("GET", url, true);
	
	request.onreadystatechange = function()
	{
		if(request.readyState == 4)
		{
			if(request.status == 200)
			{
				var image = request.responseText;

				if(image)
				{
					var newimg = document.createElement('img');
					newimg.src = 'http://www.rowan.edu/open/colleges/engineering/images/subpage_images/' + image;
					newimg.alt = '';
					document.getElementById('titleAndImage').appendChild(newimg);
				}
			}
		}
	};
	
	request.send(null);
}

addLoadEvent(setImage);