javascript textbox call event when value changes

Question

I have a textbox, and whenever the value of the box changes, I want to check and see if 20 digits have been entered.

I thought that I would use the onChange event, b

Answer 1

use onKeryPress event

  

    function CountText(field, maxlimit) 
    {
       if (field.value.length < maxlimit) // if too long...trim it!
        {
            return true;
        }
        else
          return false;
    }

check my full article on : http://www.codeproject.com/KB/validation/MyTextBox.aspx