<ja:if not exists="backgroundImage">
#mainbg, .gallery {
	background-image:-webkit-gradient(linear, left top, left bottom, from(rgba(0,0,0,1)), to(rgba(0,0,0,0)));
	background-image:-webkit-linear-gradient(top, rgba(0,0,0,1), rgba(0,0,0,0) );
	background-image:-moz-linear-gradient(top, rgba(0,0,0,1), rgba(0,0,0,0) );
	background-image:-ms-linear-gradient(top, rgba(0,0,0,1), rgba(0,0,0,0) );
	background-image:linear-gradient(top, rgba(0,0,0,1), rgba(0,0,0,0) );
	filter:progid:DXImageTransform.Microsoft.Gradient(StartColorStr=#FF000000,EndColorStr=#00000000);
}
</ja:if>
