$(document).ready(function() {
    $("a.navbutton").click( function() {
    	display = $(".menudrop").css('display');
        if (display == 'none') {
    		$("div.menudrop").slideDown("normal");
    		$(this).css("background-image","url('/wp-content/themes/todaywasawesome/images/pull2.png')");
        } else {
    		$("div.menudrop").slideUp("normal");
    		$(this).css("background-image","url('/wp-content/themes/todaywasawesome/images/pull.png')");
        }
    });  
});