รบกวนขอเพื่อนๆ พี่ๆ ช่วยหน่อยคับ ผมหาระยะห่างของเวลาไม่ได้คับ

	dt= new Date( '2014/11/10 20:30:00' ); alert(dt.toString());
	dt= new Date( '2014/11/10 20:30' ); alert(dt.toString());
	dt= new Date( '2014/11/10 20' ); alert(dt.toString()); // invalid date
	dt= new Date( '2014/11/10' ); alert(dt.toString());
	dt= new Date( '2014-11-10' ); alert(dt.toString()); // invalid date
	dt= new Date( '20:30:00' ); alert(dt.toString()); // invalid date

<script language="JavaScript">
function timeToSeconds(time) {
	var m = String(time).match(/^\s*(\d{1,2})[\.\:](\d{1,2})(?:[\.\:](\d{1,2}))?\s*$/);
	if (!m) {
		return 0;
	}
	return (parseInt(m[1]) % 24 * 3600)
		+ parseInt(m[2]) % 60 * 60
		+ (m[3] ? parseInt(m[3]) % 60 : 0);
}

	 function TimeDiff()
	 {
	 		var diff1;
			var st = document.getElementById('start').value;
			var en = document.getElementById('end').value;
			//var datetime1 = new Date(st);
			//var datetime2 = new Date(en);
			//var one_hour = 60*60;
			//var defDate = (datetime2.getTime( ) - datetime1.getTime( )) / one_hour;
			var defDate = Math.abs(timeToSeconds(st) - timeToSeconds(en)) / 3600;

			document.getElementById("tmdiff").value = defDate; 
	 	
	 	
	 }
	 
	
</script>
<b>Calculate Time Between </b><p>
<table border="1" cellspacing="0" cellpadding="2">
<tr><td>Time Start : </td><td><input type="text" id="start" name="start" onChange="TimeDiff()"></td></tr>
<tr><td>Time End : </td><td><input type="text" id="end" name="end" onChange="TimeDiff()"></td></tr>
<tr><td>Time Diff : </td><td><input type="text" id="tmdiff" name="diff"> </td></tr>
</table>

<script language="JavaScript">
function timeToSeconds(time) {
	var m = String(time).match(/^\s*(\d{1,2})[\.\:](\d{1,2})(?:[\.\:](\d{1,2}))?\s*$/);
	if (!m) {
		return 0;
	}
	return (parseInt(m[1]) % 24 * 3600)
		+ parseInt(m[2]) % 60 * 60
		+ (m[3] ? parseInt(m[3]) % 60 : 0);
}

	 function TimeDiff()
	 {
	 		var diff1;
			var st = document.getElementById('start').value;
			var en = document.getElementById('end').value;
			//var datetime1 = new Date(st);
			//var datetime2 = new Date(en);
			//var one_hour = 60*60;
			//var defDate = (datetime2.getTime( ) - datetime1.getTime( )) / one_hour;
			var defDate = Math.abs(timeToSeconds(st) - timeToSeconds(en));
			var hours = Math.floor(defDate / 3600);
			var minutes = Math.floor(defDate % 3600 / 60);
			//document.getElementById("tmdiff").value = defDate; 
			document.getElementById("tmdiff").value = hours + " hours " + minutes + " minutes"; 
			
	 	
	 	
	 }
	 
	
</script>
<b>Calculate Time Between </b><p>
<table border="1" cellspacing="0" cellpadding="2">
<tr><td>Time Start : </td><td><input type="text" id="start" name="start" onChange="TimeDiff()"></td></tr>
<tr><td>Time End : </td><td><input type="text" id="end" name="end" onChange="TimeDiff()"></td></tr>
<tr><td>Time Diff : </td><td><input type="text" id="tmdiff" name="diff"> </td></tr>
</table>