/*
 * plugin:jquery.newsSticker.js
 * version:1.0(2011.04.07)
 * update:2010.12.20
 * requires:jQuery v1.3.2 later
 * author:Manabu Kushimoto(http://web-park.org)
 */

$(function(){

	$.fn.newsSticker = function(options){
		var op=$.extend($.fn.newsSticker.defaults,options),$list=$("#"+op.list),$listChild=$list.children(),listChildLength=$listChild.length,$control=$("#"+op.control),$controlNext=$(".next",$control),$controlPrev=$(".prev",$control),i=0;
		function stickerNext(){
			if(listChildLength==1){
			}else{
				if(i==(listChildLength-1)){
					i=0;
					$list.animate({ top:i*op.height+"px" },op.speed);
				}else{
					plus=++i*op.height;
					$list.animate({ top:-plus+"px" },op.speed);
				}
			}
		};
		function stickerPrev(){
			if(listChildLength==1){
			}else{
				if(i==0){
					i=(listChildLength-1);
					$list.animate({ top:-(i*op.height)+"px" },op.speed);
				}else{
					minus=--i*op.height;
					$list.animate({ top:-minus+"px" },op.speed);
				}
			}
		};
		$controlNext.click(function(){ stickerNext(); return false; });
		$controlPrev.click(function(){ stickerPrev(); return false; });

	};
	$.fn.newsSticker.defaults = {
		list:"stickerList",
		control:"stickerControl",
		speed:300,
		height:27
	};
	$("#newsSticker").newsSticker();

});