Check this
<input type="text" id="txtStartTime" value="5:00 PM" />
<input type="text" id="txtEndTime" value="01:23 AM" />
<input type="button" id="btnCompare" value="Compare" onclick="Compare()" />
<script type="text/javascript">
function Compare() {
var strStartTime = document.getElementById("txtStartTime").value;
var strEndTime = document.getElementById("txtEndTime").value;
var startTime = new Date().setHours(GetHours(strStartTime), GetMinutes(strStartTime), 0);
var endTime = new Date(startTime)
endTime = endTime.setHours(GetHours(strEndTime), GetMinutes(strEndTime), 0);
if (startTime > endTime) {
alert("Start Time is greater than end time");
}
if (startTime == endTime) {
alert("Start Time equals end time");
}
if (startTime < endTime) {
alert("Start Time is less than end time");
}
}
function GetHours(d) {
var h = parseInt(d.split(':')[0]);
if (d.split(':')[1].split(' ')[1] == "PM") {
h = h + 12;
}
return h;
}
function GetMinutes(d) {
return parseInt(d.split(':')[1].split(' ')[0]);
}
</script>
