// FUNCTION: 	popupWindow
// PARAMETERS:	sURL - URL to open
//				iWidth - width of window in pixels
//				iHeight - height of window in pixels
// RETURN:		n/a
// PURPOSE: 	pops up sURL in a new window. New window centered on screen.
function popupWindow(sURL, iWidth, iHeight)
{
	var iScreenWidth = screen.width;
	var iScreenHeight = screen.height;
	var iLeft = (iScreenWidth - iWidth) / 2;
	var iTop = (iScreenHeight - iHeight) / 2;
	var sName = Math.floor(Math.random()*999999);
	window.open(sURL, sName, 'top='+iTop+',left='+iLeft+',width='+iWidth+',height='+iHeight+',scrollbars=yes,status=no,resizable=yes');
}