$(document).ready(function(){
        $(".red_2").css("display","none");
        $("ul").hide("fast");
        $("#div_img").hide("fast");
    });
 function changezj(v)
    {
        document.getElementById("zj").value=v;
        var pic=document.getElementById("content").getElementsByTagName('IMG');
             
         document.getElementById("zjname").innerHTML=pic[v-1].alt;
         
         $(document).ready(function(){
           $("ul").animate({height: "hide",opacity: "hide"},"fast");});
        $(document).ready(function(){
           $("#div_img").animate({height: "hide",opacity: "hide"},"fast");});
        $(document).ready(function(){
           $("ul").animate({height: "show",opacity: "show"},"slow");});
        $(document).ready(function(){
           $("#div_img").animate({height: "show",opacity: "show"},"slow");});
           
}