$(document).ready(function() {
	$("#dither").click(function(e) {
		popover();
		e.stopPropagation();
	});
});

function popover() {
    if($("#popover").css("display") != "none") {
        $("#dither").css({ display: "none" });
        $("#popover").css({ display: "none" });
    } else {
        $("#dither").css({ display: "block", height: $(document).height() }).fadeTo(1, 0.7);
        $("#popover").css({ display: "block" });
    }
}