var old;
var memold;
var subold;
if(document.layers)
{
window.captureEvents(Event.MOUSEDOWN);
window.onmousedown=do_out;
} else
{
document.onmouseup=do_out;
}
function show_layer(x)
{
if(document.layers)
document.layers[x].visibility="show";
else
document.all[x].style.visibility="visible";
}
function hide_layer(x)
{
if(document.layers)
document.layers[x].visibility="hide";
else
document.all[x].style.visibility="hidden";
}
function do_menu(x)
{
if(!old)
old=memold;
if(old!=x)
{
show_layer(x);
old=x;
} else
old="";
}
function do_check(x)
{
if(old && old!=x)
{
hide_layer(old);
show_layer(x);
old=x;
}
do_submenu();
}
function do_out()
{
if(old)
hide_layer(old);
memold=old; old="";
do_submenu();
}
function do_submenu(x)
{
if(subold)
{
hide_layer(subold);
subold="";
}
if(x)
{
show_layer(x);
subold=x;
}
}