onmouseover expand image sides to left and right

[rzrwrath]

I am trying to expand the left and right side of an image.For example if a image size is 1100px width then partial left and right will be expanded.I don't want to do full image expansion.\[code\]<div class="side_left"></div><div class="mid_container"></div><div class="side_right"></div>\[/code\]Here you can see my code: http://jsfiddle.net/squidraj/EgHGm/