Convert time formate AM/PM Time to 24 Hours Time Format
Example code:-
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>JavaScript Convert AM/PM to 24 Hours Time</title>
<script type="text/javascript">
function Converttimeformat() {
// var time = $("#starttime").val();
var time = document.getElementById('txttime').value;
var hrs = Number(time.match(/^(\d+)/)[1]);
var mnts = Number(time.match(/:(\d+)/)[1]);
var format = time.match(/\s(.*)$/)[1];
if (format == "PM" && hrs < 12) hrs = hrs + 12;
if (format == "AM" && hrs == 12) hrs = hrs - 12;
var hours = hrs.toString();
var minutes = mnts.toString();
if (hrs < 10) hours = "0" + hours;
if (mnts < 10) minutes = "0" + minutes;
alert(hours + ":" + minutes);
}
</script>
</head>
<body>
<div>
<table>
<tr>
<td><b>Enter Time:</b></td>
<td><input type="text" id="txttime" value="10:00 PM" /></td>
</tr>
<tr>
<td></td>
<td><input type="button" id="btnConvert" value="Convert to AM/PM" onclick="Converttimeformat()" /></td>
</tr>
</table>
</div>
</body>
</html>
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