Error In FF And Chrome With Obj.name

My problem is that obj.name, or any of its derivatives do not seem to work in FF and Chrome, but work fine in IE. The variable obj stems from

Code:
function catchIt(e) {
if (editing) return;
if (!document.getElementById || !document.createElement) return;
if (!e) var obj = window.event.srcElement;
else var obj = e.target;

How come obj.name becomes undefined when i alert it? What can be changed to accommodate the script for FF and Chrome as well? The rest of the code:

[Code]...