check this CSS.
The css uses a background image for the l;ogo no an inline <img> tag.
#header .line1 .logo a:link,
#header .line1 .logo a:visited,
#header .line1 .logo a:hover,
#header .line1 .logo a:active
{
display: block;
width: 228px;
height: 50px;
background: transparent url(images/fashion_mosaic/company_logo.gif) no-repeat left top;
}
#header .line1 .logo img {
display: none;
}