$(document).ready(function(){

	$("#damPopupImageMain").click(function(){
		var imWidth = $('#damPopupImage').width();
		var im = $(window);
		var imTop = im.scrollTop();
		
		$('#damPopupImage').css('margin-left',-1 * (imWidth / 2));
		$("#damPopupImage").css("left","50%");
		$("#damPopupImage").css("top",imTop+30);
	
		$('#damPopupBG').css('display','block');
		$("#damPopupBG").animate( {opacity: 0.8}, 250, "", function(){ $('#damPopupImage').fadeIn('slow'); } );
		
		$('#BT_DamPopupClose').css('display','block');
		$('#BT_DamPopupClose').css('left','50%');
		$('#BT_DamPopupClose').css('margin-left',-1*(imWidth/2));
		$("#BT_DamPopupClose").css("height",22);
		
		return false;

	});
	
	$("#damPopupImage").click(function(){
		$('#damPopupImage').css('display','none');
		
		$("#damPopupBG").animate({opacity: 0}, 250, "", function(){ $('#damPopupBG').css('display','none'); } );
		
		$('#BT_DamPopupClose').css('display','none');
	});
	
	$("#BT_DamPopupClose").click(function(){
		$('#damPopupImage').css('display','none');
		
		$("#damPopupBG").animate({opacity: 0}, 250, "", function(){ $('#damPopupBG').css('display','none'); } );
		
		$('#BT_DamPopupClose').css('display','none');
	});
	
	$(window).scroll(function(){
		var wnd = $(window);
		var wndTop = wnd.scrollTop();
		var im = $("#damPopupImage");
		var imHeight = im.height();
		var doc = $(document);
		var docHeight = doc.height();
		var bdHeight = $("body").height();
		
		if ((wndTop + imHeight) < (bdHeight - 20) && (imHeight < bdHeight)){
			$("#damPopupImage").css("top",wndTop+20);
			$("#BT_DamPopupClose").css("top",wndTop);
		}
    });
});