function LoadPopup()
{
	// get screen height/width
	var maskHeight = $(document).height();
	var maskWidth = $(window).width();

	// set mask to height/width of screen
	$('#mask').css({'width': maskWidth, 'height': maskHeight});
	
	// transition effect		
	$('#mask').fadeIn(750);	
	$('#mask').fadeTo("slow",0.8);	

	// get window height/width
	var windowHeight = $(window).height();
	var windowWidth = $(window).width();
	
	// center the popup
	$('.window').css('top',  windowHeight/2-$('.window').height()/2);
	$('.window').css('left', windowWidth/2-$('.window').width()/2);

	// transition effect
	$('.window').fadeIn(2000);
}

function CenterPopup(){ }