menu_status = new Array(); 

function showHide(theidPrefix, theidNum){
    // show/hide clicked menu element 
if (document.getElementById) {
var switch_id = document.getElementById(theidPrefix+theidNum); 

if(menu_status[theidPrefix+theidNum] != 'show'){ 
switch_id.className = 'show'; 
menu_status[theidPrefix+theidNum] = 'show';} 
else{ 
switch_id.className = 'hide'; 
menu_status[theidPrefix+theidNum] = 'hide';} 


// hide non-clicked menu elements 
n = 1; 
while( document.getElementById(theidPrefix+n) ){ 
if(n != theidNum){ 
var hide_id = document.getElementById(theidPrefix+n); 
hide_id.className = 'hide'; 
menu_status[theidPrefix+n] = 'hide'; }

n++; 
}
}
}