#wrapper { background:url(img/back3.png) no-repeat center top; }
#return_top a { display:none; }

/* ---------- pngfix ---------- */
#wrapper,#header,#middle-contents,#footer,#pngfix-right,#pngfix-left,.ul.menu, #no-side, #footer-noside, .pngfix-for-ca, #middle-contents-changeside
{ behavior: expression(IEPNGFIX.fix(this)); }