Currently i am facing an issue with one of my under development website

Demo page: Demo Page

You all can see a grey bar right after header of webpage
i have placed 5 images in that bar and also placed a JavaScript mouse-over effect on them
but when i move mouse over these pics (Just pictures on left are working)
Right side pictures are not showing any effect on mouse over

I have also placed same mouse over images after (Our Aim Image)
and at that place this effect is working perfectly.

I have also tried to place these pictures on different ares of my webpage.
But these pictures are not working right after header
And when i place these pictures after (Our Aim Image) These are working perfectly

Want Experts help to resolve this issue
Thanks to all