$(document).ready(function(){  
 /********************* master page ******************************/
 //menu
 
     if(typeof(menuID)=="undefined"){
        menuID=-1;
     }
     
     $(".menu ul li").mouseover(function(){
        if($(this).attr("class")!="over"){
            var src = $(this).children("a").children("img").attr("src");
            var newsrc = src.replace(".gif","_on.gif");
            $(this).children("a").children("img").attr("src",newsrc);
        }
     });
     
     $(".menu ul li").mouseout(function(){
        if($(this).attr("class")!="over"){
            var src = $(this).children("a").children("img").attr("src");
            var newsrc = src.replace("_on.gif",".gif");
            $(this).children("a").children("img").attr("src",newsrc);
        }
     });
     
    
     if(menuID != -1){
        $(".menu ul li").eq(menuID).attr("class","over");
        var src = $(".menu ul li").eq(menuID).children("a").children("img").attr("src");        
        var newsrc = src.replace(".gif","_on.gif");
        $(".menu ul li").eq(menuID).children("a").children("img").attr("src",newsrc);
        
     }
     
    /********************* index page ******************************/
    //图片切换
    bannerslider.initialSlide();
    
    $("#smallimg ul li").each(function(index){
        $(this).hover(function(){
             bannerslider.pauseSlide();
             ChangeIcons(index);
             bannerslider.currentSlide = index;
             $("#largeimg ul li").stop();
             $("#largeimg ul li").each(function(){
                $(this).css("opacity","0");
             });
             $("#largeimg ul li").eq(index).css("opacity",1).css("z-index","100");
        },function(){
            bannerslider.playSlide();});
    });
    
   
});

//缩略图变化
function ChangeIcons(index){
    $("#smallimg ul li").removeClass("select");
    $("#smallimg ul li").eq(index).addClass("select")
}



//首页图片切换
var bannerslider={};

bannerslider.initialSlide=function(){
    bannerslider.currentSlide=0;    
    bannerslider.totalSlides=$("#largeimg ul li").length;
    $("#largeimg ul li").each(function(){
        $(this).css("opacity","0");
    });
    $("#largeimg ul li").eq(0).css("z-index","100").css("opacity","1");
    bannerslider.playSlide();
    $("#largeimg ul li").hover(function(){
        bannerslider.pauseSlide();},function(){bannerslider.playSlide();});
   
};

bannerslider.showSlide=function(current,next){
    $("#largeimg ul li").stop();
    $("#largeimg ul li").eq(current).fadeTo(1000,0);
    $("#largeimg ul li").eq(next).fadeTo(1000,1,function(){
        $("#largeimg ul li").each(function(){
            $(this).css("z-index","99");
        });
        $("#largeimg ul li").eq(next).css("z-index","100");
    });
    ChangeIcons(next);
};

bannerslider.nextSlide=function(){
    var current  =bannerslider.currentSlide;
    bannerslider.currentSlide++;    
    if(bannerslider.currentSlide>=bannerslider.totalSlides)
        bannerslider.currentSlide=bannerslider.currentSlide%bannerslider.totalSlides;
    bannerslider.showSlide(current,bannerslider.currentSlide);
};

bannerslider.playSlide=function(){
    bannerslider.slidesTimer=window.setInterval(bannerslider.nextSlide,3000);
};

bannerslider.pauseSlide=function(){
    if(bannerslider.slidesTimer)
    {
        window.clearInterval(bannerslider.slidesTimer);
    }
};