CSS style for my button was as follows:
background: none url(‘../Images/btn.gif’);
In above code, ‘none’ for background is basically default value.
I googled online and after hit and trial, I just remove ‘none’ from background. so, button background style looks like:
It resolved the issue for IE non-compatibility, Chrome and Firefox. Hopefully, it will be helpfull for those facing the same problem during their Web Development efforts.