Resolve Event Events Firefox "event is not defined" and ie normal problem

http://macrabbit.iteye.com/blog/968628

	Document.onkeydown=function Mykeydown () {
	       if (Event.keycode =) {Checkdata ();} 
	       return;
	}

The above JS code in IE running normally in Firefox in the old "event is not defined" error. The reason for this is that different event object models are used in Firefox, unlike the IE DOM, which is used by the Internet. There is no event in the Firefox DOM, which is addressed in the following ways, and is compatible with IE and Firefox.

	Document.onkeydown=function Mykeydown (e) {
	      //compatible IE and Firefox because there is not event in Firefox
	       e = e| |event;
        if (E.keycode =) {Checkdata ();} 
	       return;
	}