Announcement

**piz** · Mar 4, 2004, 05:09 AM

Use this, for example:

<input type="text" onblur="this.value=Math.round(parseInt(this.value)/5)*5" />

**elvie** · Mar 4, 2004, 06:09 AM

thanks mate, works perfectly....

**Kor** · Mar 4, 2004, 06:37 AM

should've thanked also to the mates on the other forum... They gave you also similar solutions...

**Garadon** · Mar 4, 2004, 07:36 AM

you should use ceil not round if you want to always round up as you say

**Kor** · Mar 4, 2004, 07:42 AM

you should use ceil not round if you want to always round up as you say

Nope. He wants to round to the nearest 5 multiple, ceil or floor.

Math.ceil would have round it always to the nearest down value

**Kor** · Mar 4, 2004, 07:43 AM

aaa. I mean up value... If it is ceil... yea

**Garadon** · Mar 4, 2004, 08:21 AM

Hi there,

I'm creating a large order form and need to limit the input to multiples of 5.

Is there a way that JavaScript can automatically round a number up to the nearest multiple? i.e. user enters 8, on pressing tab to next text box, value changes to 10?

Thanks in advance....

**glenngv** · Mar 5, 2004, 03:44 AM

But the thread subject is...

Only allow multiples of 5 in a text box or round to nearest multiple

So it means round up or down depending on the nearest multiple.

i.e.
8 => 10 //round up
7 => 5 //round down

Therefore, the code that piz suggested works perfectly.

**Kor** · Mar 5, 2004, 03:55 AM

Even my English is not my first language I think the missunderstanding came from a bad translation...

As far as I know, to round up is a verbal construction in itself, where up has not the sense of direction. I.e : to shut up, to give up... To round up means simply to round.

Further more, when he mentioned the nearest multiple I think that is clear he need to simply round, not to round ceil it.

**Garadon** · Mar 5, 2004, 04:06 AM

k I ain't english either

. but to me the only logical interpretation of:
round a number up to the nearest multiple.

would be that any and all number where rounded up.

where as if direction was of no matter it would be:
round a number to the nearest multiple.

and down would be.
round a number down to the nearest multiple

if a word of direction had no meaning how would you ever tell people what way you wanted to round a number?.

**Kor** · Mar 5, 2004, 04:19 AM

this Forum will become a linguistic one.

I presume that, if he wanted up or down he would have specified thus:

the nearest up multiple...

Interesting is that we are debating thinly linguistic issues, and the initiator never entered and told us what we really ment by that

**glenngv** · Mar 5, 2004, 04:19 AM

Originally posted by Garadon
where as if direction was of no matter it would be:
round a number to the nearest multiple.

That's exactly what the thread subject said.
The first post's message body may have confused you but the subject clearly stated that.

The thread starter already confirmed the correctness of the posted script so the real intention is to round up or down to the nearest multiple of 5.

**elvie** · Mar 5, 2004, 08:22 AM

Thanks to everybody that has replied to my original post…
English is my second language [I'm from New Zealand [that's a poor joke]].

In my original post I did mean round UP to the next multiple, and so I’m using the math.ceil instead of math.round.

The only problem is that when I don’t have a value in a text box and tab across it, I’m left with NaN. I’m using some other JavaScript to prevent users entering non-numeric data, but still getting the NaN when tabbed across.

So now my page is looking something like this: [any idea how to get rid of the NaN occouring?].

PHP Code:


<html>

<head>

<title>Untitled Document</title>

<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">

<SCRIPT TYPE="text/javascript">// for numbers only......

<!--

// copyright 1999 Idocs, Inc. [url]http://www.idocs.com[/url]

// Distribute this script freely but keep this notice in place

function numbersonly(myfield, e, dec)

{

var key;

var keychar;



if (window.event)

   key = window.event.keyCode;

else if (e)

   key = e.which;

else

   return true;

keychar = String.fromCharCode(key);



// control keys

if ((key==null) || (key==0) || (key==8) || 

    (key==9) || (key==13) || (key==27))

   return true;



// numbers

else if ((("0123456789£.").indexOf(keychar) > -1))

   return true;



// decimal point jump

else if (dec && (keychar == "."))

   {

   myfield.form.elements[dec].focus();

   return false;

   }

else

   return false;

}



//-->

</SCRIPT>

</head>

<body>

<input type="text" size="5" maxlength="5" onKeyPress="return numbersonly(this, event)" onblur="this.value=Math.ceil(parseInt(this.value)/5)*5">

<input type="text" size="5" maxlength="5" onKeyPress="return numbersonly(this, event)" onblur="this.value=Math.ceil(parseInt(this.value)/5)*5">

<input type="text" size="5" maxlength="5" onKeyPress="return numbersonly(this, event)" onblur="this.value=Math.ceil(parseInt(this.value)/5)*5">

</body>

</html>

**Garadon** · Mar 5, 2004, 09:06 AM

Code:

function rounder(aObj)
{
  if(aObj.value=="")return;
  aObj.value=Math.ceil(parseInt(aObj.value)/5)*5;
}
//-->

</SCRIPT>

</head>

<body>

<input type="text" size="5" maxlength="5" onKeyPress="return numbersonly(this, event)" onblur="rounder(this)">

Announcement

Only allow multiples of 5 in a text box or round to nearest multiple

Only allow multiples of 5 in a text box or round to nearest multiple

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