I have this submenu that opens with mouseover, and all was good until I tested on firefox. Seems like this code doesnt work on IE nor firefox, is() isnt working. Any ideas?

this is my code:

$("#m4").mouseenter(function () { m4 = false; submenu(2) }); $("#m4").mouseleave(function () { if ($("#panel2").is(':hover')) { m4 = false } else { m4 = true } submenu(2) }) $("#panel2").mouseleave(function () { m4 = true; submenu(2) });