var myMenu = new SDMenu("main_menu"); // ID of the menu element
// Default values...
myMenu.speed = 3;                     // Menu sliding speed (1 - 5 recomended)
myMenu.remember = true;               // Store menu states (expanded or collapsed) in cookie and restore later
myMenu.oneSmOnly = false;             // One expanded submenu at a time
myMenu.markCurrent = true;            // Mark current link / page (link.href == location.href)

myMenu.init();

      

Download: sdmenu.zip