jQuery - JSON to hml and data formatting

<script>

var phone_number = 1111222233;

var backend_date = "02/13/2013";

var months = new Array("January","February","March","April","May","June","July","August","September","October","November","December");

function convert_phone()
{
phone_number = phone_number.toString();
var area_code = phone_number.substring(0,3);
var prefix = phone_number.substring(3,6);
var suffix = phone_number.substring(6,10);
var convertedNumber = area_code + "-" + prefix + "-" + suffix;
alert(convertedNumber);
}

function convert_date()
{
var divider = backend_date.split("/");
var month = parseFloat(divider[0]) - 1;
month = months[month];
var day = divider[1];
var year = divider[2];
var fully_converted_date = month + "-" + day + "-" + year;
alert(fully_converted_date);
}

window.onload = function() {
convert_phone();
convert_date();
}

</script>