submenus = new Array();
submenus[1]='treatment_submenu';
submenus[2]='fertility_submenu';

function showSubmenu(num) {

if (num==1) { hideSubmenu(2); }
if (num==2) { hideSubmenu(1); }
obj=document.getElementById(submenus[num]);
clearTimeout(obj.timeout);
obj.style.display="";

}

function timedHideSubmenu(num) {
obj=document.getElementById(submenus[num]);
obj.timeout=setTimeout('obj.style.display="none"', 500);
}

function hideSubmenu(num) {
obj=document.getElementById(submenus[num]);
clearTimeout(obj.timeout);
obj.style.display="none";

}