程序代码：

<script type="text/javascript">
var tID={$channelid};
function show_menu(ID){
  if(ID!=tID){
    $('sub_menu').innerHTML = '&nbsp;'+$('menu_cont_'+ID).innerHTML;
    $('menu_'+ID).className = 'nav-on';
    $('menu_'+tID).className = 'nav-off';
    tID=ID;
  }else{
    $('menu_'+ID).className = 'nav-on';
    $('sub_menu').innerHTML = '&nbsp;'+$('menu_cont_'+ID).innerHTML;    
  }
}
show_menu({$channelid});
</script>

程序代码：

<script type="text/javascript">
    function qiehuan(num){
        for(var id = 0;id<=9;id++)
        {
            if(id==num)
            {
                document.getElementById("qh_con"+id).style.display="block";
                document.getElementById("mynav"+id).className="nav_on";
            }
            else
            {
                document.getElementById("qh_con"+id).style.display="none";
                document.getElementById("mynav"+id).className="";
            }
        }
    }
</script>