[SOLVED] Validation error

[rickphp]

The w3c validator is showing this error:

 

.min-width Value Error : width  Parse Error expression(((document.documentElement.clientWidth | document.body.clientWidth) 1005)? "1005px" : "100%")

 

The line in question is

 

.min-width {width:expression(((document.documentElement.clientWidth || document.body.clientWidth) < 1005)? "1005px" : "100%"); min-width:1005px; background:url(img/bg-top.gif) top repeat-x; }

 

Can anybody help resolve this one?

 

Thanks!