function launchWindow(id) {
		//Get the screen height and width
		var maskHeight = $(document).height();
		var maskWidth = $(window).width();

		//Set heigth and width to mask to fill up the whole screen
		$('#mask').css({'width':maskWidth,'height':maskHeight});

		//transition effect
		$('#mask').fadeIn(1000);
		$('#mask').fadeTo("slow",0.8);

		//Get the window height and width
		var winH = $(window).height();
		var winW = $(window).width();

		//Set the popup window to center
		$(id).css('top',  winH/2-$(id).height());
		$(id).css('left', winW/2-$(id).width()/2);

		//transition effect
		$(id).fadeIn(2000);
}