$(document).ready(function() {
	$(".page_slider_button").click( function() {
    	if ($("#page_slider_openCloseIdentifier").is(":hidden")) {
    		$("#page_slider").animate({
    			top: "-336px"
                }, 500 );
            $("#page_slider_openCloseIdentifier").show();
        } else {
            $("#page_slider").animate({
                top: "0px"
                }, 500 );
            $("#page_slider_openCloseIdentifier").hide();
        }
    });
});