Hi Guys,
Can anyone pls tell me how can I check if the number input by user is decimal if it is then it should only be upto 2 decimal places.

I can check if it is decimal by isdecimal() but how can I check the number of digits from decimal point.

Any help would be very much appreciate.
cheers

Hi,

One way is to use a regular expression - just pass the number & required decimal places to this method...
HTH,

Chris

Good idea, perhaps with a minus?

--

Joe (Microsoft MVP - XML)

Hi Chris,
The function which you mentioned:
function CheckDecimal(pNum, pDp){
    return new RegExp("^\\d*\\.\\d{0," + pDp + "}$").test(pNum);

Since I need two decimal places does that infer that pdp = 2
and what does "d" stand in RegExp .
Is test and RegExp inbuilt functions in JavaScript.
Waiting for reply.

Hi,

Yep, make pDp = 2 for 2 decimal places.

\d means a decimal character in regular expression syntax, but as it's being passed to the expressions constructor as a string, it needs to be escaped and hence becomes \\d.

new RegExp creates a regular expression object and test is one of it's methods/functions - well worth checking out if you're going to do much in the way of string manipulation or validation.

Cheers,

Chris