jQuery(function( $ ){
	//easing
	$.easing.easeInOutQuart = function (x, t, b, c, d) {
		if ((t/=d/2) < 1) return c/2*t*t*t*t + b;
		return -c/2 * ((t-=2)*t*t*t - 2) + b;
	};		
	//init buttons
	//webdesign	
	$('#bt_webdesign').click(
		function(){
			p = $(window).height()*0.04 + $('#header').height() + 30;			
			$.scrollTo('#webdesign',{speed:900 , offset:-p, easing:'easeInOutQuart'});
		}	
	)
	//films
	$('#bt_films').click(
		function(){
			p = $(window).height()*0.04 + $('#header').height() + 30;			
			$.scrollTo('#films',{speed:900 , offset:-p, easing:'easeInOutQuart'});
		}	
	)
	//contact
	$('#bt_contact').click(
		function(){
			p = $(window).height()*0.04 + $('#header').height() + 30;			
			$.scrollTo('#contact',{speed:900 , offset:-p, easing:'easeInOutQuart'});
		}	
	)
	//links
	$('#bt_links').click(
		function(){
			p = $(window).height()*0.04 + $('#header').height() + 30;			
			$.scrollTo('#links',{speed:900 , offset:-p, easing:'easeInOutQuart'});
		}	
	)
})