javascript Window.event help

[trylah]

I am a javascript beginner. I do not what this code
mean? Plz explain to me.

'-------------------------------
var key;
if (window.event)
key = window.event.keyCode;
'-----------------------------
what i do not understand is this line:
if (window.event)

Is it in javascript everytime an object is put inside
if syntax

example:
if(object)

Is this used to check whether the object exist or not?
Am I correct?

[Ryan Fait]

Yes, it's used to see whether the function is supported by that browser.

[trylah]

Originally Posted by Ryan Fait

Yes, it's used to see whether the function is supported by that browser.

You mean in this case

if(window.event)

is to check whether window.event is supported by browser?

[Ryan Fait]

Indeed....