Posted on 2008-10-01
Last Modified: 2010-04-21
I am using the following script's attached  to format decimal places and pad zeros.
Is there a way to combine both pieces of code. At present one will undo the other
What I need is if I enter 8 ,  On Change  It becomes 008.0000 or if I enter 89.9  On Change it becomes

Decimal places          onchange="fix(this)" 

function fix(o){

 if( !isNaN(parseInt(o.value,10)) )


    o.value = parseInt(o.value).toFixed(4);



Pad zeros     onblur="padValue(this,3);"

function pad(num, count) {


var lenDiff = count - String(num).length;


var padding = "";



if (lenDiff > 0)


while (lenDiff--)


padding += "0";



return padding + num;





function padValue(el, count) {


var num = Number(el.value);



if ( isNaN(num) ) {


alert("Please only enter numbers");


} else {


el.value = pad(num, count);



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Question by:Camnoc
LVL 29

Accepted Solution

Göran Andersson earned 500 total points
ID: 22612638
Use the following function like this:

function formatField(obj, decimals, len) {

   var n = Number(obj.value);

   if (!isNaN(n)) {

      var s = parseInt(n).toFixed(decimals);

      while (s.length < len) s = '0' + s;

      obj.value = s;

   } else {

      alert("Please only enter numbers");



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Author Closing Comment

ID: 31501886
Thanks very much. Much better code.

Thanks again

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