$(function(){
	 var len  = $("div.defFouse ul > li").length;
	 var index = 0;
	 var adTimer; 
	 var zindex = 999;
	 var $num = $('div.defFouse dl dd');
	 var $img = $("div.defFouse li");
	 
	 $num.mouseover(function(){
		 index = $num.index(this);
		 showImg(index);
		 index++;
		if(index==len){
			index=0;
		}
	 }).eq(0).mouseover();
	 
	 $('div.defFouse').hover(function(){
			 clearInterval(adTimer);
		 },function(){
			 adTimer = setInterval(function(){
				showImg(index); 
				index++; 
				if(index==len){
					index=0;
				}
			  } , 4000);
	 }).trigger("mouseleave");
})

function showImg(index){
	$("div.defFouse li").fadeOut(); 
	$("div.defFouse li").eq(index).fadeIn();
	$('div.defFouse dd').removeClass("cur");
	$('div.defFouse dd').eq(index).addClass("cur");
}