Wax.leaf.util eventoffset (bad existence test on variable, return js error)

[wizidot]

Hi,
in wax.leaf.js L2330, when you want use wax.movetip the script have to check the mouse position
but it seems there is a little test who cause js error

if (e.pageX|| e.pageY) {
// Good browsers 

i purpose a little patch :

if (typeof e=="undefined") var e = (window.event)?window.event:return {x:0,y:0};
if (typeof e.pageX!="undefined" || typeof e.pageY!="undefined") {
// Good browsers