$(document).ready(function(){
	
	/* Sub navigation selected state */

	$(".sub_nav li a").click(function(e){ 
		
		if(!$(this).hasClass("sub_selected")){
			switch(e.target.id){  
				
             case "nav_exhibition":
                 $("#nav_exhibition").addClass("sub_selected");  
                 $("#nav_commission").removeClass("sub_selected");  
                 $("#nav_past").removeClass("sub_selected");  
                 $(".exhibitions").fadeIn();  
                 $(".commissions").css("display", "none");  
                 $(".past").css("display", "none");  
             break;  
			 
			 case "nav_commission":  
                  $("#nav_exhibition").removeClass("sub_selected");  
                 $("#nav_commission").addClass("sub_selected");  
                 $("#nav_past").removeClass("sub_selected");  
                 $(".exhibitions").css("display", "none");  
                 $(".commissions").fadeIn();
                 $(".past").css("display", "none");
             break; 
			 
			 case "nav_past":  
                 $("#nav_exhibition").removeClass("sub_selected");  
                 $("#nav_commission").removeClass("sub_selected");  
                 $("#nav_past").addClass("sub_selected");  
                 $(".exhibitions").css("display", "none");   
                 $(".commissions").css("display", "none");
                 $(".past").fadeIn();
             break; 
			}
		};
			
	});
	
	$(".sub_nav_sale li a").click(function(e){ 
		
		if(!$(this).hasClass("sub_selected")){
			switch(e.target.id){  
				
             case "nav_paintings":
                 $("#nav_paintings").addClass("sub_selected");  
                 $("#nav_skulls").removeClass("sub_selected");
                 $(".paintings").fadeIn();  
                 $(".skulls").css("display", "none");  
             break;  
			 
			 case "nav_skulls":  
                  $("#nav_paintings").removeClass("sub_selected");  
                 $("#nav_skulls").addClass("sub_selected"); 
                 $(".paintings").css("display", "none");  
                 $(".skulls").fadeIn();
             break; 
			 
			}
		};
			
	});
	
	
	/* Exhibition thumbnail position */
	$count = 0;
	$(".thumbs li").each(function(){
		if($(this).index() % 3 == 0){
			$(this).addClass("first_thumb");
		}
	});
	
	// hide #back-top first
	$(".back_top").hide();
	
	
	$(window).scroll(function () {
		if ($(this).scrollTop() > 100) {
			$('.back_top').fadeIn();
		} else {
			$('.back_top').fadeOut();
		}
	});

	// scroll body to 0px on click
	$('.back_top a').click(function () {
		$('body,html').animate({
			scrollTop: 0
		}, 800);
		return false;
	});


});