Thread: Javascript Regex Pattern for decimal number(18,5)

hi
i want to allow user only to input data in this format only
Number(18,5).
so far i just written for number only .how to write for (18,5). meant allow one decumal point and maximum 18 digits before decimal point and can be maixum 5 digits after decimal point.

Code:

var pattern = /^[0-9]+$/;

Hope it make some sense.

Try a pattern something like this:-

Code:

^[0-9]{1,18}+(\.[0-9]{1,5})?$

Hope that helps.

Your example shows a comma (,) not a decimal point (.) ...

Which do you need?

offcourse i need decimal.below is function i m calling on onkeypress event.

Code:

function fnClientNumericOnly()
      {
        var pattern = /^[0-9]{1,18}+(\.[0-9]{1,5})?$/;
        

        if(!pattern.test(String.fromCharCode(event.keyCode)))
    	{
    	    event.keyCode = 0;
    	}

      }

getting object expected error.for this pattern var pattern = /^[0-9]+$/;
i m not getting any error.

Maybe something to do with the { and } I haven't used regex patterns in javascript before, so I'm unsure what you use instead....

Here's a start:

Code:

/^[-+]?\d{1,18}(\.\d{1,5})?$/

You'll have to fine-tune it if you have more requirements...

Try this:-

Code:

function test(value){
var patt1;
  if(value.indexOf(".")==-1){
     patt1=new RegExp("^[0-9]{1,18}$");
  }else{
     patt1=new RegExp("^[0-9]{1,18}(\.[0-9]{1,5})?$");
  }
  if(patt1.test(value)){
    alert('Successful');
  }else{
    alert('No Match');
  }
}

I found it was the + that was causing the problem. I also found that if you didn't include a decimal point, it allowed you to add mor ethan 18 numbers. Not sure why that happened, but I tried the above and it seemed to work.

You might want to make a few changes to fit in with your code. I just had it firing on a button click which passed the value of a textbox to the function.

Hope that helps.

Guys Thanks for a reply.i chekced code of both but problem is its not allowing decimal point.

Hmm...Strange...Mine worked when I tested it...I couldn't get J's to work, but I checked mine against various values.
Allowed

Code:

1
123456789
123456789123456789
123456789.0
123456.12345
123456789.12345
123456789123456789.12345

Not Allowed

Code:

123456.123456
123456789.
1234567891234567891.12345
123456789123456789.123456

Have you tried the code provided exactly as is?

no i just use this
("^[0-9]{1,18}(\.[0-9]{1,5})?$"); in my pattern actually i m testing this on my onkeypress event.