Parse timestring into milliseconds

**Vidar_** · Apr 18, 2007 02:26

Hi!

I have a textbox where users enter a time, for example 12:30. I want to get the number of milliseconds that time represents. Any suggestions on how to do this?

**bosko** · Apr 18, 2007 03:27

Try this:

Code:

<html>
<head>
<script type='text/javascript'>
function timeconv() {
	var t_val = tform.ttext.value;
	var t_arr = t_val.split(':');
	for(var i = 0; i < t_arr.length; i++) {
		t_arr[i] = parseInt(t_arr[i]);
		}
	var t_hours = t_arr[0]*60*1000;
	var t_minits = t_arr[0]*1000;
	var t_answer = t_hours+t_minits;
	alert(t_answer);
	}
</script>
</head>
<body>
<form name='tform'>
<input type='text' name='ttext'>
<input type='button' value='Convert' onclick='timeconv()'>
</form>
</body>
</html>

**mrhoo** · Apr 18, 2007 09:06

You need more data, vidar-
Is the time this day's time, or next tuesday?
if it is today, is it 24 hour time, or do you need to adjust for am/pm?
All these details can trip up date calculations.

But to keep it simple, say it is today and 24 hour time, and the input value (V) is '12:30'

Code:

function gettimestamp(V){	
	var H= V.split(/\D+/);
	V=new Date();
	V.setHours(H[0],H[1]);
	return V.getTime();
}

returns integer milliseconds since midnight, January 1,1970 GMT

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