Fixed Menu On Scroll (with Desktop only Logic) jQuery

	$(window).scroll( function() {
		var scroll_count = 0;
		if ( $(this).scrollTop() > 250 && $(this).width() > 768  ) {
			 $(".nav-menu").addClass("positionfixed");
			 if ( scroll_count < 1 ) {
			 		$(".nav-menu").hide();
					$(".positionfixed").fadeIn();
				}
			 scroll_count = 1;
		 } else {
			 $(".nav-menu").show();
			 $(".nav-menu").removeClass("positionfixed");
			  scroll_count = 0;
		 }
	 
 });