$(function(){
        
                $("#btnContactUs").click(function(){showEmail();});
                 $("#LBOverlay").click(function(){closeEmailDiv();});
                 $("#LBClose").click(function(){closeEmailDiv();});

});

        function closeEmailDiv(){
            $("#LBContainer").fadeOut(500);
            $("#LBOverlay").hide();
        }

        function showEmail(){
            $("#LBOverlay").show();
            centerElement($("#LBContainer"));
            $("#LBContainer").fadeIn(500);
        } 
       
        function centerElement(element){
            $(element).css({
                "left" : $(window).width()/2 - $(element).width()/2,
                "top" : $(window).height()/2 - $(element).height()/2
            });
        };