var old_menu=''; 
var old_cell=''; 
function pl_menuclick(submenu){ 
if(old_menu!=submenu){
 if(old_menu!=''){
 old_menu.style.display='none';
 //old_cell.src='img/left.gif';
 }
 submenu.style.display='block';
 //cellbar.src='img/left1.gif';
 old_menu=submenu;
 //old_cell=cellbar;
 }
else{submenu.style.display='none';
 //cellbar.src='img/left.gif';
 old_menu='';
 //old_cell='';
 }}
 
function menuclick1(submenu,cellbar){ 
//if(old_menu!=submenu){
 //if(old_menu!=''){
// old_menu.style.display='none';
 //old_cell.src='img/left.gif';
 //}
 submenu.style.display='block';
 cellbar.src='img/left1.gif';
 //old_menu=submenu;
 //old_cell=cellbar;
// }
//else{submenu.style.display='none';
// cellbar.src='img/left.gif';
// old_menu='';
// old_cell='';
//}
 }