Validating form fields using javascript

An email address must contain at least a ‘@’ sign and a dot (.).Also, the ‘@’ must not be the first character of the email address, and the last dot must at least be one character after the ‘@’ sign.

A Java Script check is useful because it stops the form from being submitted if there is a problem, saving lots of time for your readers.Now we will see how we can validate our entered form data before submitting it to the web server.The following example shows how to validate an entered email address.Below are the ways to get the value from all types of form elements.In all cases, the form is called That's checking the value's equality with a null String (two single quotes with nothing between them).

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