Validate that dollar amount has no "cents"

[bdog4]

I want to validate a number to so that they can only input $2.00, 5.00,
7.00, 50.00 etc... I don't wan them to be able to put cents on the
amount. It can either either be 2 or 2.00 Any ideas on how I can do
this? Thanks

[Kien]

bd***@hotmail.com wrote:

I want to validate a number to so that they can only input $2.00, 5.00,
7.00, 50.00 etc... I don't wan them to be able to put cents on the
amount. It can either either be 2 or 2.00 Any ideas on how I can do
this? Thanks

Math.round(Num)+".00"

But what do you do with $2.05 or $2.50?

[Hal Rosser]

"Kien" <ca*********@gmail.com> wrote in message
news:Bd*****************@news-server.bigpond.net.au...

bd***@hotmail.com wrote:

I want to validate a number to so that they can only input $2.00, 5.00,
7.00, 50.00 etc... I don't wan them to be able to put cents on the
amount. It can either either be 2 or 2.00 Any ideas on how I can do
this? Thanks

Math.round(Num)+".00"

But what do you do with $2.05 or $2.50?

-
Or
Math.floor(num) - to ignore anything after the decimal.
the $ make it NaN

[Randy Webb]

Hal Rosser said the following on 3/12/2006 12:37 AM:

"Kien" <ca*********@gmail.com> wrote in message
news:Bd*****************@news-server.bigpond.net.au...

bd***@hotmail.com wrote:

I want to validate a number to so that they can only input $2.00, 5.00,
7.00, 50.00 etc... I don't wan them to be able to put cents on the
amount. It can either either be 2 or 2.00 Any ideas on how I can do
this? Thanks

Math.round(Num)+".00"

But what do you do with $2.05 or $2.50?

-
Or
Math.floor(num) - to ignore anything after the decimal.
the $ make it NaN

Neither of which limits the input to all digits, which is what the OP
wanted.

if (+fieldRef.value = parseInt(fieldRef.value,10))

But a Regular Expression might be preferable.

--
Randy
comp.lang.javascript FAQ - http://jibbering.com/faq & newsgroup weekly
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/

[bdog4]

Yeah not sure how I really wanted to handle it, I figured regular
expressions may the way to go. I really didn't want them to be able to
type anything other than a say 2.00 or 2 or 4.00 or 5 etc... I wanted
to check it on keyup to make sure it meets the requirement. I'll mess
with with some of these. Let me know if you that clears up any. Thanks!

[bdog4]

Looks like I can make randy's parses anything to the right of the
decimal. Is there I can just check to see if they have any cents and
alert them to fix it? Say if they have 2.25 then alert("Sorry has to
be in dollar amounts") I could just parse it like randy has but I'd
like to alert them that it isn't in the proper format and let them fix
it. Thanks

[bdog4]

Got it I think:

var NumericRegExp =/^\d+(\.[0]{0,2})?$/;
var regex = new RegExp(NumericRegExp);
if (!regex.test(a)){
alert(a + " is not a valid for this field.");
return false;
}
else {
alert("Ok");
}

[RobG]

bd***@hotmail.com wrote:

Got it I think:

var NumericRegExp =/^\d+(\.[0]{0,2})?$/;
var regex = new RegExp(NumericRegExp);
if (!regex.test(a)){
alert(a + " is not a valid for this field.");
return false;
}
else {
alert("Ok");
}

Just a thought: ask for whole dollars and check that the input is all
digits (i.e. an integer), e.g.

<label for="Amount">Please enter whole dollars:&nbsp<br>
<b>$</b><input type="text" id="Amount" onkeyup="
var msg = '';
if(!/^\d*$/.test(this.value)) msg = 'Whole $ only please!';
document.getElementById('msg').innerHTML = msg;
}
"></label><div id="msg"></div>

--
Rob

[bdog4]

Thanks rob I'll try that...

[Dr John Stockton]

JRS: In article <11**********************@i40g2000cwc.googlegroups .com>
, dated Sun, 12 Mar 2006 11:36:01 remote, seen in
news:comp.lang.javascript, bd***@hotmail.com posted :

Got it I think:

var NumericRegExp =/^\d+(\.[0]{0,2})?$/;
var regex = new RegExp(NumericRegExp);
if (!regex.test(a)){
alert(a + " is not a valid for this field.");
return false;
}
else {
alert("Ok");
}

That above allows 0 0. 0.00 the middle of which is poor practice and
not included in what you asked for. Decimal points, being little,
should always be guarded by at least one digit in each side.

OK = /^\d+(\.00)?$/.test(a)

I prefer the structure
OK = <test>
if (!OK) <complain>
return OK

--
© John Stockton, Surrey, UK. ?@merlyn.demon.co.uk Turnpike v4.00 IE 4 ©
<URL:http://www.jibbering.com/faq/> JL/RC: FAQ of news:comp.lang.javascript
<URL:http://www.merlyn.demon.co.uk/js-index.htm> jscr maths, dates, sources.
<URL:http://www.merlyn.demon.co.uk/> TP/BP/Delphi/jscr/&c, FAQ items, links.