#content1{
	background:#fff url(images/site_28.gif) 0 0 no-repeat;
}
#content2{
	background:  url(images/site_31.gif) 100% 0 no-repeat;
}
#content3{
	background:  url(images/site_35.gif) 0 100% no-repeat;
}
#content4{
	background:  url(images/site_36.gif) 100% 100% no-repeat;
}