aliceffekt's jquery visible image script

usage.js

$(window).scroll(function () { visibleImg(); });

visible_image.js

function visibleImg(){
		
	viewHeight = $(window).height();
	viewPort   = $(window).scrollTop();
	viewLength = viewHeight + viewPort;	
	
	$('a.image').each(function(index) {
		
		imageId       = $(this).attr("id");
		imagePosition = $(this).offset();
		imageLimit    = viewPort - parseInt($(".image#"+imageId+" img").css("height"));
		imageHeight   = parseInt($(".image#"+imageId).css("height"));
		
		// Response:Load
		if($(this).has("img").length == 0 && imagePosition.top+imageHeight > viewPort && imagePosition.top < viewLength){
			$(this).append("<img src='img/diary/"+imageId+".jpg' style='display:none'/>");
			$(".image#"+imageId+" img").fadeIn(500);
		}
		// Response:Unload
		else if($(this).has("img").length > 0 && imagePosition.top < imageLimit){
			$(this).css("height",imageHeight);
			$(".image#"+imageId+" img").remove();
		}
	});
	
}