var num_k=5; //菜单总数
var num_i=1; //菜单默认值
//setFocus1(0);
num_tt=setInterval("num(1)",3000);
function num(a){
clearInterval(num_tt);
num_tt=setInterval("num(1)",3000);
num_i+=a;
if (num_i>num_k){num_i=1;}
if (num_i==0){num_i=num_k;}
//alert(i)
for (var j=1; j<=num_k; j++){
document.getElementById("list_"+j).style.display="none";
}
document.getElementById("list_"+num_i).style.display="block";
document.getElementById("page").innerHTML = num_i+"/"+num_k;
}