Javascript validating empty fields

07-Apr-2016 00:41 by 5 Comments

Javascript validating empty fields - Free adult chat rooms for year mobile phoneou

At first we use regular expression and the replace() method to clear out any spacer characters.Next, we use the is Na N() function to check if the phone number contain only numbers.

This means that the input data must contain at least an @ sign and a dot (.).

The idea behind Java Script form validation is to provide a method to check the user entered information before they can even submit it.

Java Script also lets you display helpful alerts to inform the user what information they have entered incorrectly and how they can fix it.

We want to allow only letters, numbers and underscopes.

validate Password ( ) The function below checks the password field for blankness and allow only letters and numbers - no underscopes this time.

So we should use a new regular expression to forbid underscopes. Next, we want to permit only passwords that contain letters and at least one numeral.

For that we use the seacrh() method and two more regular expressions: /(a-z) / and /(0-9)/.

If the element complies than sufunction returns an empty string.

Otherwise it returns a message describing the error and highlight appropriate element with yellow.

If you run a validation of the users form input before the form is submitted, there will be no wait time and redundant load on the server.

"Bad data" are already filtered out when input is passed to the server-based program. Client side form validation usually done with javascript.

This wont be perfect validation it is possible to slip not compliant addresses by it but it's normally good enough.

  1. Free random web chat love 02-Jan-2016 12:08

    Approximate preparation and cooking time: 20 minutes Serves: 2 Given a choice, I will eat only the rice from the biryani, but if I do decide to have a chicken piece I’ve always preferred chicken on the bone.

  2. Free old granny chat in essex 10-Jan-2016 22:47

    Top Chats presents you with the hottest adult chat environments on the web.