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Validating a form using javascript

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It sets the focus to the input field until the user supplies a valid value.When the user does so, they may proceed and can supply value to the next available field. I want to validate the user login form using Java Script and Maria DB.I know how to connect to database using PHP, but if I have to do it through Java Script, is that possible?Let us now write the Java Script function that behaves as the on Click handler for the second button in the above form.where, o Form is a reference to the form object passed to the function using as shown in the form above.The on Submit handler for the form requires also that a value be entered in all fields before the form can be submitted.

Server-side validation is more secure but often more tricky to code, whereas client-side (Java Script) validation is easier to do and quicker too (the browser doesn't have to connect to the server to validate the form, so the user finds out instantly if they've missed out that required field! In this tutorial we'll build a simple form with client-side Java Script validation.

Form validation is the process of checking that a form has been filled in correctly before it is processed.

For example, if your form has a box for the user to type their email address, you might want your form handler to check that they've filled in their address before you deal with the rest of the form.

We will create Java Script functions (one for each input field whose value is to validate) which check whether a value submitted by user passes the validation.

All those functions are called from another function.

Shows you how to write a script that ensures your form is filled in correctly before it's sent to your server.

Great for "required fields" such as email addresses!

I I want to get the user's table using Java Script.

The user will get an error when, of course, their username/password does not match what they have on the database. I am going to use jquery which is an excellent javascript framework.

If you enter an invalid Email address, or a value for Age outside the specified range, a .

When all fields have been validated the form will be able to be submitted.