function fnShowDialogBox() {
    //Get the A tag
    id = '#dialogContent';

    //Get the screen height and width
    var maskHeight = $(document).height();
    var maskWidth = $(window).width();

    //Set heigth and width to mask to fill up the whole screen
    $('#mask').css({ 'width': maskWidth, 'height': maskHeight });

    //transition effect		
    //$('#mask').fadeIn(400);
    $('#mask').fadeTo("slow", 0.6);

    //Get the window height and width
    var winH = $(window).height();
    var winW = $(window).width();

    //Set the popup window to center
    $(id).css('top', winH / 2 - $(id).height() / 2);
    $(id).css('left', winW / 2 - $(id).width() / 2);

    //transition effect
    $(id).fadeIn(200);

    $('#mask').click(function () {
        fnHideDialogBox();
    });

    $('#mask').click(function () {
        fnHideDialogBox();
    });

    
}

function fnHideDialogBox() {
    id = '#dialogContent';
    $('#mask').hide();
    $(id).hide();
}