header {
	min-height: 700px;
	background-image: url(../img/fon-header.jpg);
	background-position: top center;
	-o-background-size: cover;
	-moz-background-size: cover;
	-webkit-background-size: cover;
	background-size: cover;

}

//адаптивная картинка в header при min-height
function wResize() {
$("header").css("height", $(window).height());
};
wResize();
$(window).resize(function() {
wResize();
});