$(document).ready(function() { 
 
    //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 id = $(this).attr('href');
     
        //Get the screen height and width
        var maskHeight = $(document).height();
        var maskWidth = $(window).width();
     
        //Set height and width to mask to fill up the whole screen
        //$('#mask').css({'width':maskWidth,'height':maskHeight});
        $('#mask').css({'width':maskWidth,'height':maskHeight,'top':0,'left':0});
         
        //transition effect    
        $('#mask').fadeIn(1000);   
        $('#mask').fadeTo("slow",0.8); 
     
        //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);
        
        $(id).centerInClient();
     
    });
     
    //if close button is clicked
    $('.window .close').click(function (e) {
        //Cancel the link behavior
        e.preventDefault();
        $('#mask, .window').hide();
    });    
     
    //if mask is clicked
    $('#mask').click(function () {
        $(this).hide();
        $('.window').hide();
    });        
     
});  

$.fn.centerInClient = function(options) {
    /// <summary>Centers the selected items in the browser window. Takes into account scroll position.
    /// Ideally the selected set should only match a single element.
    /// </summary>    
    /// <param name="fn" type="Function">Optional function called when centering is complete. Passed DOM element as parameter</param>    
    /// <param name="forceAbsolute" type="Boolean">if true forces the element to be removed from the document flow 
    ///  and attached to the body element to ensure proper absolute positioning. 
    /// Be aware that this may cause ID hierachy for CSS styles to be affected.
    /// </param>
    /// <returns type="jQuery" />
    var opt = { forceAbsolute: false,
                container: window,    // selector of element to center in
                completeHandler: null
              };
    $.extend(opt, options);
   
    return this.each(function(i) {
        var el = $(this);
        var jWin = $(opt.container);
        var isWin = opt.container == window;

        // force to the top of document to ENSURE that 
        // document absolute positioning is available
        if (opt.forceAbsolute) {
            if (isWin)
                el.remove().appendTo("body");
            else
                el.remove().appendTo(jWin.get(0));
        }

        // have to make absolute
        el.css("position", "absolute");

        // height is off a bit so fudge it
        var heightFudge = isWin ? 2.0 : 1.8;

        var x = (isWin ? jWin.width() : jWin.outerWidth()) / 2 - el.outerWidth() / 2;
        var y = (isWin ? jWin.height() : jWin.outerHeight()) / heightFudge - el.outerHeight() / 2;

        el.css("left", x + jWin.scrollLeft());
        el.css("top", y + jWin.scrollTop());

        // if specified make callback and pass element
        if (opt.completeHandler)
            opt.completeHandler(this);
    });
}

$(document).ready(function (){
    $('#home_img_div').fadeIn(1000);
});