// JScript 文件
function show(num,total,tab)
{
    //alert(num);
    for (i = 1; i <= total; i++) {
        document.getElementById(tab+"item" + i).className = "item";
    }
    document.getElementById(tab+"item" + num).className = "iteminit";
    
    for (i = 1; i <= total; i++) {
        document.getElementById(tab+"sub" + i).style.display = "none";
    }
    document.getElementById(tab+"sub" + num).style.display = "block";
}