function showsubmenu(sid) 
{ 
 for (i=1;i<4;i++) 
 { 
     if (sid == i) 
    {whichEl = eval("submenu" + sid); 
    if (whichEl.style.display == "none"){eval("submenu" + sid + ".style.display=\"\";");} 
        else{eval("submenu" + sid + ".style.display=\"none\";");}} 
    else 
    {eval("submenu" + i + ".style.display=\"none\";");} 
 } 
}