how do i retrieve dom array in .on() event?

how do i retrieve dom array in .on() event?

for example
  1. <script type="text/javascript">
    $().ready(function(){

        $('input').on('change',{name:'Lcb'} , ShowMessage);

        function ShowMessage(MyEvent) {
            alert(MyEvent.data.name);
        }
    });
    </script>
    </head>
    <body>
    <input type="text" value="1" id="test[]"/>
    <input type="text" value="2" id="test[]"/>
    <input type="text" value="3" id="test[]"/>
    <input type="text" value="4" id="test[]"/>
    <input type="text" value="5" id="test[]"/>
    </body>
    </html>

how do i get array index of trigger object?