Choosing backgrounds from user-profile field!!

[gamerzhut]

I wanted my members to select the background for their userinfo field. I have created a custom profile field with the background images... How do i implement it with this code.

.postbitlegacy .userinfo2 {
	float:{vb:stylevar left};
	position: relative;
	width:{vb:math {vb:stylevar postbitlegacy_userinfo_width}-{vb:math {vb:stylevar 
padding}*2}}; 
	padding: 2px {vb:stylevar padding} {vb:math {vb:stylevar padding}/2};
	font-size: {vb:stylevar small_fontSize};
	display:block;
 background: url(I want this to be selected from my profile field);

background: url(I want this to be selected from my profile field);

I tried this, but no luck...

background: url({vb:raw post.field11}) no-repeat;