$(document).ready(function() {
	$(".goingup").click(goingUp);
	$(".goingdown").click(goingDown);			
});

var topMargin = 0;
var blurTopMargin = -494;
var slideSize = 478;

function goingUp(){
	topMargin = topMargin + slideSize;
	blurTopMargin = blurTopMargin + slideSize;
	$(".box.first").animate({marginTop: topMargin + "px"}, "normal", "swing" );
	$("#blur").animate({marginTop: blurTopMargin + "px"}, "normal", "swing" );
}

function goingDown(){
	topMargin = topMargin - slideSize;
	blurTopMargin = blurTopMargin - slideSize;
	$(".box.first").animate({marginTop: topMargin + "px"}, "normal", "swing" );
	$("#blur").animate({marginTop: blurTopMargin + "px"}, "normal", "swing" );
}