$(document).ready(function () {
    $('.window').hide();
    //select all the a tag with name equal to modal
    $('a[name=modal]').click(function (e) {
        //Cancel the link behavior
        e.preventDefault();

        //Get the A tag
        var href = $(this).attr('href');
        var id = "[id$='" + href + "']";

        //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(1000);
        $('#mask').fadeTo("slow", 0.7);

        //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(2000);
    });

    //if close button is clicked
    $('.window .close').click(function (e) {

        //Cancel the link behavior

        e.preventDefault();

        $('#mask').hide();
        $('.window').hide();
    });

    //if mask is clicked
    $('#mask').click(function () {
        $(this).hide();
        $('.window').hide();
    });

});