Javascript Date
by Ju Oliveira
HTML
<script src="ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<p id="demo"></p>
JavaScript
var theAdd = new Date();
theAdd.setHours(10, 00, 00, 000);
theAdd.setMinutes(theAdd.getMinutes() + 30);
theAdd.setHours(theAdd.getHours() + 1);
document.getElementById("demo").innerHTML = theAdd.getHours() + ":" + theAdd.getMinutes();