Image with same path doesn’t show up due to cache in browsers

Browsers are designed to think that Images with same name don’t change rapidly so regularly.  This creates a problem in some cases where you have to reuse a  specific name Or a specific location for a system.

What Rasmus Lerdorf is talking about AJAX

Are you blindly following any ajax library to work your way. Take a look what Rasmus is talking about AJAX He follows the rule of simplicity as he described in his framework approach.