activmenuarrow = new Image();
activmenuarrow.src = "graph/lamenuarrow.gif";

passivemenuarrow = new Image();
passivemenuarrow.src = "graph/lmenuarrow.gif";

function selectmenu(menunumber){

myarrow=eval('document.'+'menu'+menunumber);
myarrow.src=activmenuarrow.src;

}  

function unselectmenu(menunumber){

myarrow=eval('document.'+'menu'+menunumber);
myarrow.src=passivemenuarrow.src;

}  


function SetVisible(id)
{
all=50;
for (i=0;i<all; i++)
 {
   s=document.getElementById('menuitem'+i);
   if (s)
   {
      if (i==id)
       {
         if (s.style.display == 'block') s.style.display='none';
            else s.style.display='block';
       }
       else s.style.display='none';
   }
 }
}            

function SetVisible1(id)
{
all=50;
for (i=0;i<all; i++)
 {
   s=document.getElementById('submenuitem'+i);
   if (s)
   {
      if (i==id)
       {
         if (s.style.display == 'block') s.style.display='none';
            else s.style.display='block';
       }
       else s.style.display='none';
   }
 }
}         

function SetVisible2(id)
{
all=50;
for (i=0;i<all; i++)
 {
   s=document.getElementById('subsectmenu'+i);
   if (s)
   {
      if (i==id)
       {
         if (s.style.display == 'block') s.style.display='none';
            else s.style.display='block';
       }
       else s.style.display='none';
   }
 }
}