$(function(){  
    $('#general').add_layer("url('/images/header_back.jpg') no-repeat center top"); 
	$('#general').add_layer("url('/images/footer_back.jpg') no-repeat center bottom");
	if ($('#general').height() < 1800) {
	$('#general').height(1800);
	} else {
	$('#general').height();
	}
});