Military Time

would it be in the format

HH:MM

? If so, then I guess you could split up the string (time) and check each part...eg

the first two digits MUST have two digits... ie: 01 or 11 etc... and cannot be greater than 24

the second two digits also must have two digits and cannot be more than 59 or less than 00.

that the sort of thing??

This should get you started:

Enter Military Time (only)
<input type="text" onchange="if(!this.value.match(/^([01]\d|2[0-3])(:[0-5]\d){1,2}$/))
{alert('Please enter only military time in this input');this.value=''}">

How about if you allow input of anything the user wishes and convert it to what you want:

// timefmt1.js
// Written: 2004-06-16 by James Alarie <jalarie@umich.edu>
// http://spruce.flint.umich.edu/~jalarie/
//
// Call TimeFmt1 with a time to be formatted, and format-out code.
// Valid format-out codes are:
//
// format code description example
// ----------------- ------------------------------- ----------------
// HH:MM:SS am 12-hour, colons, seconds 03:37:41 pm
// HH:MM am 12-hour, colon, no seconds 03:37 pm
// HH24:MM:SS 24-hour, colons, seconds 15:37:41
// HH24:MM 24-hour, colon, no seconds 15:37
// HH24MMSS 24-hour, no colons, seconds 153741
// HH24MM 24-hour, no colons, no seconds 1537
//
// Examples:
//
// Time_out=TimeFmt1(input_time,'hh24mmss');
//
// Notes:
// A null input time causes return of the current time.
// If the input value contains colon(s), leading zeros are not needed.
// Spaces are ignored.
// The "am" or "pm" may be upper-case, lower-case, or mixed.

function TimeFmt1(ITime,FormatO) {
TF_Input=ITime; // time to format
TF_FormatO=FormatO; // desired output format
if (!TF_Input) {
TF_Now=new Date();
TF_HH=TF_Now.getHours();
TF_MM=TF_Now.getMinutes();
TF_SS=TF_Now.getSeconds();
TF_Input=TF_HH+':'+TF_MM+':'+TF_SS;
}
if (!TF_FormatO) { TF_FormatO='HH24MMSS'; }
TF_Input=TF_Input.toLowerCase();
TF_Input=TF_Input.replace(/\ /g,'');
TF_FormatO=TF_FormatO.toLowerCase();

TF_HH='';
TF_MM='';
TF_SS='';
TF_am='am';
if ((TF_ix1=TF_Input.indexOf('am')) > -1) {
TF_Input=TF_Input.substring(0,TF_ix1);
TF_am='am';
}
if ((TF_ix1=TF_Input.indexOf('pm')) > -1) {
TF_Input=TF_Input.substring(0,TF_ix1);
TF_am='pm';
}

// HH:MM:SS:
if (TF_Input.match(/^[0-9]{1,2}\:[0-9]{1,2}\:[0-9]{1,2}$/)) {
TF_ix1=TF_Input.indexOf(':');
TF_HH=TF_Input.substring(0,TF_ix1);
TF_Input=TF_Input.substring(TF_ix1+1);
TF_ix1=TF_Input.indexOf(':');
TF_MM=TF_Input.substring(0,TF_ix1);
TF_Input=TF_Input.substring(TF_ix1+1);
TF_SS=TF_Input;
if ((TF_am == 'am') && (TF_HH == 12)) {
TF_HH=0;
}
}
// HH:MM:
if (TF_Input.match(/^[0-9]{1,2}\:[0-9]{1,2}$/)) {
TF_ix1=TF_Input.indexOf(':');
TF_HH=TF_Input.substring(0,TF_ix1);
TF_Input=TF_Input.substring(TF_ix1+1);
TF_MM=TF_Input;
if ((TF_am == 'am') && (TF_HH == 12)) {
TF_HH=0;
}
}
// HH24:MM:SS:
if (TF_Input.match(/^[0-9]{1,2}\:[0-9]{1,2}\:[0-9]{1,2}$/)) {
TF_ix1=TF_Input.indexOf(':');
TF_HH=TF_Input.substring(0,TF_ix1);
TF_Input=TF_Input.substring(TF_ix1+1);
TF_ix1=TF_Input.indexOf(':');
TF_MM=TF_Input.substring(0,TF_ix1);
TF_Input=TF_Input.substring(TF_ix1+1);
TF_SS=TF_Input;
}
// HH24:MM:
if (TF_Input.match(/^[0-9]{1,2}\:[0-9]{1,2}$/)) {
TF_ix1=TF_Input.indexOf(':');
TF_HH=TF_Input.substring(0,TF_ix1);
TF_Input=TF_Input.substring(TF_ix1+1);
TF_ix1=TF_Input.indexOf(':');
TF_MM=TF_Input.substring(0,TF_ix1);
}
// HH24MMSS:
if (TF_Input.match(/^[0-9]{6}$/)) {
TF_HH=TF_Input.substring(0,2);
TF_MM=TF_Input.substring(2,4);
TF_SS=TF_Input.substring(4,6);
}
// HH24MM:
if (TF_Input.match(/^[0-9]{4}$/)) {
TF_HH=TF_Input.substring(0,2);
TF_MM=TF_Input.substring(2,4);
}

if ((TF_am == 'pm') && (TF_HH != 12)) {
TF_HH=TF_HH*1+12;
}
if (TF_SS == '') { TF_SS=0; }
TF_SS=TF_HH*3600+TF_MM*60+TF_SS*1;
TF_HH=Math.floor(TF_SS/3600);
TF_SS=TF_SS%3600;
TF_MM=Math.floor(TF_SS/60);
TF_SS=TF_SS%60;
if (TF_HH < 10) { TF_HH='0'+TF_HH*1; }
if (TF_MM < 10) { TF_MM='0'+TF_MM*1; }
if (TF_SS < 10) { TF_SS='0'+TF_SS*1; }

// input complete; ready for output.
TF_Out='';

if (TF_FormatO == 'hh:mm:ss am') {
if (TF_HH < 12) {
TF_am='am';
} else {
TF_am='pm';
TF_HH-=12;
}
if (TF_HH == 0) {
TF_HH=12;
}
if (TF_HH < 10) { TF_HH='0'+TF_HH*1; }
TF_Out=''+TF_HH+':'+TF_MM+':'+TF_SS+' '+TF_am;
}
if (TF_FormatO == 'hh:mm am') {
if (TF_HH < 12) {
TF_am='am';
} else {
TF_am='pm';
TF_HH-=12;
}
if (TF_HH == 0) {
TF_HH=12;
}
if (TF_HH < 10) { TF_HH='0'+TF_HH*1; }
TF_Out=''+TF_HH+':'+TF_MM+' '+TF_am;
}
if (TF_FormatO == 'hh24:mm:ss') {
TF_Out=''+TF_HH+':'+TF_MM+':'+TF_SS;
}
if (TF_FormatO == 'hh24:mm') {
TF_Out=''+TF_HH+':'+TF_MM;
}
if (TF_FormatO == 'hh24mmss') {
TF_Out=''+TF_HH+TF_MM+TF_SS;
}
if (TF_FormatO == 'hh24mm') {
TF_Out=''+TF_HH+TF_MM;
}
if (TF_Out == '') {
alert('*** Invalid Format for Output: '+TF_FormatO);
}

return TF_Out;
}

http://www.codingforums.com/showthread.php?t=40105#post209845

Thanks everyone. This works great!

How would i implement that into my form? I have a need that the form has to format a time field (simple text field) into military time and think this will work for that, but how do i call the scritp?

<imput type="text" name="event_time" onblur="TimeFmt1">??

I'm ratehr new to JS and would like to get this field done so that i can move on with other aspects. i have been tryingt o figure someithng out all day and keep coming up empty handed.

you could try

<input type="text" name="event_time" onchange="TimeFmt1(this.value,'HH24MMSS')">

that might work?

<html>
<head>
<script type="text/javascript">

Date.prototype.toMilitaryString(){
return (isNaN(this)) ? NaN:this.getHours() + ':' + this.getMinutes();
}

function validate(oForm){
//validate event time
var oTime = oForm.event_time;
if (oTime.value == ""){
alert("Event time is required.");
oTime.focus();
return false;
}
var d = new Date("1/1/2004 " + oTime.value);
var mt = d.toMilitaryString();
if (!isNaN(mt)){
oTime.value = mt;
}
else {
alert("Event time should be in military format.");
oTime.focus();
return false;
}

//...validate other fields, return false if invalid


return true; //all inputs valid
}
</script>
</head>
<body>
<form name="myForm" onsubmit="return validate(this)">

<input type="text" name="event_time" />

...other fields

<input type="submit" name="btnSubmit" value="Submit" />

</form>
</body>
</html>

I'm getting an error @ line 6 character 34.

Sorry I didn't test what I posted. I also found other bugs so I fixed all of them.

<html>
<head>
<script type="text/javascript">

Date.prototype.toMilitaryString = function(hasLeadingZeroHour){
if (isNaN(this)) return "";
var h = this.getHours();
var m = this.getMinutes();
if (hasLeadingZeroHour){
if (h < 10) h = "0" + h;
}
if (m < 10) m = "0" + m;
return h + ":" + m;
}

function validate(oForm){
//validate event time
var oTime = oForm.event_time;
if (oTime.value == ""){
alert("Event time is required.");
oTime.focus();
return false;
}
var d = new Date("1/1/2004 " + oTime.value);
var mt = d.toMilitaryString(true);
if (mt != ""){
oTime.value = mt;
alert("Time:" + oTime.value); //debug
}
else {
alert("Event time should be in military format.");
oTime.focus();
return false;
}

//...validate other fields, return false if invalid


alert("Submitting..."); //debug

return true; //all inputs valid
}
</script>
</head>
<body>
<form name="myForm" onsubmit="return validate(this)">

<input type="text" name="event_time" />

...other fields

<input type="submit" name="btnSubmit" value="Submit" />

</form>
</body>
</html>

Thanks man, this works great!