yah I use Chrome, but it not only browser I use to test my script like
Safari, Opera, IE8, FireFox, and Navigator 9.
Anyway it happen with me when I use Chrome and Safari ,
Antonio Conte, Thanks dear for your comment but I already know this thing and I don't have problem with , Thanks a lot !!
HartleySan, I agree with you, maybe it could be globe in webkit browsers !! but why i dont hear about before, anyway you too Thanks a lot for helping