/*
 * plugin:jquery.slideSwitchImg.js
 * version:1.0(2011.06.15)
 * requires:jQuery v1.3.2 later
 * author:Manabu Kushimoto(http://web-park.org)
 */


$(function(){

	var $slideParentClass=$(".slideSwitchImg"),slideChildBlock="slideBlock";
	$.fn.slideSwitchImg=function(){
		var $t=$(this),$tChild=$("."+slideChildBlock,$t),childLength=$tChild.children().length,activeIndex=1,active="active",
		randomIndex=Math.floor(Math.random()*childLength),propety={ w:$t.width(), h:$t.height() };
		$(">*",$tChild).eq(randomIndex).addClass(active);
		if(childLength==randomIndex+1){
			$tChild.css({left:0+"px",width:(propety.w)*(childLength+1)+"px",height:propety.h+"px"}).show(function(){
				$(">*",$tChild).not($(">*",$tChild).eq(randomIndex)).remove().clone(true).appendTo($tChild);
			});
		}else{
			$tChild.css({left:-(propety.w*randomIndex)+"px",width:(propety.w)*(childLength+1)+"px",height:propety.h+"px"});
		}
		setSwitch=setInterval(function(){
			var index=($tChild.children().index($("."+active,$tChild)))+1,nextElem=index+1;
			if(childLength<=index){
				index=$tChild.children().index($("."+active,$tChild))-(childLength-1);
				$("."+active,$tChild).removeClass(active)
				$(">*:first",$tChild).addClass(active);
			}else{
				$("."+active,$tChild).removeClass(active).next().addClass(active);
			}
			$tChild.animate({
				left:-(propety.w*index)+"px"
			},500,function(){
				if(childLength==index+1){
					$tChild.css({left:0+"px"}).show(function(){
						$(">*",$tChild).not($(">*",$tChild).eq(index)).remove().clone(true).appendTo($tChild);
					});
				}
			});
		},4000);
	};
	$slideParentClass.each(function(){
		$("<div />").addClass(slideChildBlock).append($(this).children()).appendTo(this);
		$(this).slideSwitchImg();
	});


});