$().ready(function() {
  $('#dialog').jqm();
    
});

$(document).ready(function() {  

    //select all the a tag with name equal to modal
    $('a[name=modal]').click(function(e) {
       
        //Get the A tag
        var id = $(this).attr('href');

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

        
        //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);

    });
});