i want to have an image behind my google adsense
just like the below image
but when i tried the following css
L{
background: transparent url("http://www.triphp.com/images/adback.png") repeat-x left bottom; padding-bottom:0px; padding-top:0px;
height: 352px;
padding: 50px 30px 0;
width: 350px;
}
i am getting image but as background check this image for this
how can i make it like the above one??