.icon-blog i{
	background-image: url('png/blog.png');
	background-repeat: no-repeat;
}
.icon-book i{
	background-image: url('png/book.png');
	background-repeat: no-repeat;
}
.icon-doc, .guide a {
	background-image: url('png/doc.png');
	background-repeat: no-repeat;
}
.icon-downloads i{
	background-image: url('png/downloads.png');
	background-repeat: no-repeat;
}
.icon-reference i{
	background-image: url('png/reference.png');
	background-repeat: no-repeat;
}