Problem with loading small images

I managed to create my own site(just images I made) http://andreimogos.uv.ro/and want it to keep it as simple as possible.

My host is a free one and didn't expect much of it(the overall loading is fine). Still I don't understand why it takes so long to see the mouse-over images (once you mouse-over over the menu).
The images are just 5-7 kb in size so why the lag?

I used the Image Rollover function in Dreamweaver.
Am I doing something wrong in the script?

hey nice work, very cool.
it seems to be changing upon mouse over instantly for me, maybe it's your computer that's lagging?

It seems to work fine for me but started to lag when I repeatedly moused on/off the images.

I'm not sure how confident you are with CSS, but one option may be using the a:hover attribute. In general this seems to be less laggy than Javascript options.

That being said it looks like everything was done correctly. The images are pre-loaded and the Javascript seems to be correct.

Dreamweaver write bloated code. You're better off with your own javascript, or using a simple 'onmouseover' event on the image (and preload the hover images elsewhere). It's a little more hand-work but the results are worth it.