$(document).ready( function() {
	if ($("#mortgage_button")) {
		$("#mortgage_button").click( function() {
			$("#mortgage_calc_form").css("top", ( $(window).height() - $("#mortgage_calc_form").height() ) / 2+$(window).scrollTop() + "px");
			$("#mortgage_calc_form").css("left", ( $(window).width() - $("#mortgage_calc_form").width() ) / 2+$(window).scrollLeft() + "px");
			$("#mortgage_calc_form").fadeIn('slow');
			return false;
		});
	}
});