Convert dd-mm-yyyy to mm-dd-yyyy format in Javascript

HTML

<script src="https://vitalets.github.io/combodate/combodate.js"></script>
<script src="https://vitalets.github.io/combodate/momentjs/moment.min.2.5.0.js"></script>
<input id="date-of-birth" type="text" data-format="DD-MM-YYYY" data-template="D MMM YYYY"><!-- value="06-01-1980" -->

JavaScript

var $dobInput = $("#date-of-birth");
var dobValue = $dobInput.val();
var formattedDate;
if (dobValue) {
var chunks = dobValue.split('-');
formattedDate = chunks[1] + '-' + chunks[0] + '-' + chunks[2];
}else{formattedDate=""}
$dobInput
	.val(formattedDate)
    .attr({
    	"data-format": "DD-MM-YYYY",
        "data-template": "DDD M YYYY"
	})
    .combodate();