Random starting slideshow

Someone can help me to do a slideshow on my div background ? slideshow need to start with a random image from 20 slider images from the folder. Is there any solution for that ? I am very new in web design, so kindly help ?? my site link given below

http://goo.gl/OPDIbt

Problems embedding and scaling a video slider?

Hello,

I'm trying to embed a fluid video that would auto-fit the screen, I tried a lot of tricks but to no avail.

Please help me!

http://www.socialbunny.co/stadio

Thank you!

Horizontal Image Slider

Hey, i'm studying graphic design at uni. We are doing web design and im trying to get a bit of an upperhand on everyone and i've been really trying to make my site look good. I am using dreamweaver because we have to and it's easiest. I have been trying to find javascript ones and trying to find css codes for it.. but nothing seems to work.
I am positive that someone on here knows how to do it.

But here is my problem:

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