Question

I have to allow user to allow only numeric values in the text box . It should remove any non numeric method. No matter how they are supplying the input …either typing or copy+paste.

My code

var nCheck  = function (field) {
var re = /^[0-9]*$/;
               if (!re.test(field.value)) {

                       field.value = field.value.replace(/[^0-9]*$/g,"");
               }
 };

This works except when you copy paste something like aaa2 . Whereas aaaa or aa work. Problem is when last place contains number it fails .

Thanks for any help.

Answer 1

The $ means “end of string”. Remove it and it should work.

Other tips:

Replace * by +; * includes the empty string

Maybe it should better to warn the user, just in case the numeric character is a typo (like pressing Q instead of 1)