function showTop()
	{
		//Position the topBox. In this example I am just centering it on the screen
		boxWidth = 600;
		boxHeight = 360;

		screenWidth=document.all?document.body.clientWidth:window.innerWidth;
		screenHeight=document.all?document.body.clientHeight:window.innerHeight;
		
		xPos = (screenWidth - boxWidth) * 0.5;
		yPos = (screenHeight - boxHeight) * 0.1;
		
		
		document.getElementById('topbox').style.left=xPos;
		document.getElementById('topbox').style.top=yPos;

		//Show the background overlay and topbox...
		document.getElementById('screenoverlay').style.visibility = 'visible';
		document.getElementById('topbox').style.visibility = 'visible';
	}
	
	function delayedShowTop(seconds)
	{
		setTimeout("showTop()", seconds*1000);
	}
	
	function closeTop()
	{
		//Hide the overlay and tobox...
		document.getElementById('screenoverlay').style.visibility = 'hidden';
		document.getElementById('topbox').style.visibility = 'hidden';
	}