$(document).ready(function() {
	$("#item2").hide();
	$("#item3").hide();
	var currentItem = 1;
  
  
	$("#next").click(function(){
		
		if(currentItem < 3)
		{
			currentItem++;
			changeItem(currentItem);
		}
		else
		{
			currentItem = 1;
			changeItem(currentItem);
		}
	})
	
	$("#prev").click(function(){
		
		
		if(currentItem > 1)
		{
			currentItem--;
			changeItem(currentItem);
		}
		else
		{
			currentItem = 3;
			changeItem(currentItem);
		}
	})
	
	function changeItem(num)
	{
		switch(num)
		{
			case 1: show1();
			break;
			
			case 2: show2();
			break;
			
			case 3: show3();
			break;
			
			default: alert("There has been a problem, the page will refresh. If you are concerend about this please email j.e.fairfull@dundee.ac.uk");
			window.location.reload();
			
		}

	}
	
	function show1()
	{
		$("#item2").fadeOut(100);
		$("#item3").fadeOut(100);		
		setTimeout("$('#item1').fadeIn(100)",105);
		setTimeout("$(\"#p1\").attr(\"src\",\"_includes/widgets/lg.png\")",100);
		setTimeout("$(\"#p2\").attr(\"src\",\"_includes/widgets/sm.png\")",100);
		setTimeout("$(\"#p3\").attr(\"src\",\"_includes/widgets/sm.png\")",100);
	}
	
	function show2()
	{
		$("#item1").fadeOut(100);
		$("#item3").fadeOut(100);		
		setTimeout("$('#item2').fadeIn(100)",105);

		setTimeout("$(\"#p1\").attr(\"src\",\"_includes/widgets/sm.png\")",100);
		setTimeout("$(\"#p2\").attr(\"src\",\"_includes/widgets/lg.png\")",100);
		setTimeout("$(\"#p3\").attr(\"src\",\"_includes/widgets/sm.png\")",100);
	}
	
	function show3()
	{
		$("#item1").fadeOut(100);
		$("#item2").fadeOut(100);		
		setTimeout("$('#item3').fadeIn(100)",105);
		
		setTimeout("$(\"#p1\").attr(\"src\",\"_includes/widgets/sm.png\")",100);
		setTimeout("$(\"#p2\").attr(\"src\",\"_includes/widgets/sm.png\")",100);
		setTimeout("$(\"#p3\").attr(\"src\",\"_includes/widgets/lg.png\")",100);
	}
	
	
 });