/*piao qi lai*/
function is_touch_device() {
  return !!('ontouchstart' in window);
}

jQuery(document).ready(function($)
{
	var header_h = $("#header-wrapper").height() + 650;
	var menu_h = $("#menu").height();
	var speed = 500;
	
	var scroll_critical = parseInt(header_h - menu_h);
	var window_y = 0;
	var menu_left_margin = 100;
	window_y = $(window).scrollTop();
	
	
	if ( (window_y > scroll_critical) && !(is_touch_device()) ) header_transform();
	
	function header_transform(){
		//alert("head transform")
			window_y = $(window).scrollTop();
			var wp_admin_height = "0px";
			if ($("#wpadminbar").length > 0){
				wp_admin_height = parseInt($("#wpadminbar").height()) + "px";
			}
			if (window_y > scroll_critical) {
				if (!($("#header-wrapper").hasClass("fixed"))){
						$("#header-wrapper").hide();
						$("#wrapper").css("margin-top", header_h + "px");
						$("#header-wrapper").addClass("fixed").css("top", wp_admin_height);
						$("#header-wrapper").fadeIn(1);
				}

				
			} else {
				if (($("#header-wrapper").hasClass("fixed"))){
					$("#header-wrapper").fadeOut(1, function(){
						$("#header-wrapper").removeClass("fixed");
						$("#wrapper").css("margin-top", "");
						$("#header-wrapper").fadeIn(1)
					});
					
					
				}

			}
	}
	

	
	$(window).scroll(function(){
		if (!(is_touch_device())) header_transform();			

	})

	
});