data.chinahighlights.com/js/chtinit.js

/*  Ready
    ---------------------------------------------  */
$(function(){
   	$(".currentFlag").click(function(){
	   $(".slideBox").show(); 
	});
	$(".languageSwitch .slideBox .closeBox").click(function(){
	   $(".slideBox").hide(); 
	});	
});

 $(document).ready(function(){
        // Keep the lightbox cover the whole document
        var pageHeight;
        calculateLightboxHeight();
        function calculateLightboxHeight() {
            pageHeight = $(document).height()+"px";
            $('.cover').height(pageHeight);
        }
        $(window).resize(function(){
            calculateLightboxHeight();
        });
 });

(function() {
		 var navlinks = $('#menu-primary li:not(:first-child)');
         var openDropdown = false;
         var $dw = $('#nav-dropdown');
         var $slider = $('#window-slide');
         var speed = 300;
         
         function slideDropdown(value) {
            $slider.animate({ top: value }, speed);
         }

         navlinks.mouseenter(
             function(e){
				 var _tgobj=setTimeout(function(){
					$('#header').addClass('setbg');
				 //$dw.show();
					 if(!openDropdown) {
							 $('.cover').addClass('coverBox');
							 $dw.show("slide", { direction: "up" }, 400);
							 $dw.removeClass('closed').addClass('open');
							 openDropdown = true;
					 }
					 
					 var target = '#dropdown-'+ $(e.target).text().toLowerCase().replace(/(^\s*)|(\s*$)/g, "").replace(/ /ig, "-");
					 //console.log(target);
					 switch(target) {
						 case '#dropdown-china-tours' :
								slideDropdown('0');
						 break;
						  case '#dropdown-single-destinaton' :
								slideDropdown('-260');
						 break;
						 case '#dropdown-create-my-trip' :
								slideDropdown('-520');
						 break;
						 case '#dropdown-planning' :
								slideDropdown('-780px');
						 break;
						 case '#dropdown-destinations' :
								slideDropdown('-1040px');
						 break;
						  case '#dropdown-culture' :
								 slideDropdown('-1300px');
						  break;                
					 }		 
				 } ,350);
				 $(this).mouseleave(function(){
					clearTimeout(_tgobj);	 
				 })
             }
         );
		 $('#menu-primary li:nth-child(1)').mouseenter(
             function(e){
				 //$(this).children('div').fadeIn(500);
                 if(openDropdown) {
                     $('.cover').removeClass('coverBox');
                      if ($dw.hasClass('open')) {
                         $dw.hide("slide", { direction: "up" }, 400);
                         $dw.removeClass('open').addClass('closed');   
                      }
                      openDropdown = false;
                 }
             }
         );
         $('#header').mouseleave(
            function(e){
				$('#header').removeClass('setbg');
				//$dw.hide();
                if(openDropdown) {
                    $('.cover').removeClass('coverBox');
                     if ($dw.hasClass('open')) {
                        $dw.hide("slide", { direction: "up" }, 400);
                        $dw.removeClass('open').addClass('closed');   
                     }
                     openDropdown = false;
                }
            }
         );
		 //鼠标离开导航链接时取消遮罩并收起导航详细 by tdy@20131230
		 $('#mainMenu').mouseleave(function(){
			var cTime = true;
		 	var menuobj = setTimeout(function(){
							cTime = false;
							$('#header').removeClass('setbg');
							if(openDropdown) {
								$('.cover').removeClass('coverBox');
								 if ($dw.hasClass('open')) {
									$dw.hide("slide", { direction: "up" }, 400);
									$dw.removeClass('open').addClass('closed');   
								 }
								 openDropdown = false;
							}
						},50);
			$('#nav-dropdown').mouseenter(function(){
				if(cTime){
					clearTimeout(menuobj);
				}
			});
		 });
})();