window.onload=function(){
        var li=document.getElementById("btn").getElementsByTagName("li");
        kkk=document.getElementById("imm").getElementsByTagName("a");
        for(var i=0;i<kkk.length;i++){
            if(i!=0){
                kkk[i].style.opacity=0;
            }
        }
        for(var j=0;j<li.length;j++){
                li[j].onmouseover=function(){
                    var that=this;
                    tt=setTimeout(function(){ var index=that.innerHTML-1;
                        n=index;
                        if(index <kkk.length){
                            for(var o=0;o<li.length;o++){
                                li[o].className="";
                                kkk[o].style.opacity=0;
                                kkk[o].style.zIndex=9998;
                            }
                            that.className="on";
                            kkk[index].style.opacity=1;
                            kkk[index].style.zIndex=9999;
                            kkk[index].style.transition="opacity 0.8s";
                           leftf(-300,0,kkk[index]);
                        }
                    },100);

                };