A form with method="get" How to interact with the user, with the Request. A form with method="post" How to interact with the user, with the Request. A form with radio buttons How to interact with the user, through radio buttons, with the Request. Information sent from a form with the GET method is visible to everyone (it will be displayed in the browser's address bar) and has limits on the amount of information to send. Form command is used to collect values in a form with method="post". Query String command is used to collect values in a form with method="get".

to avoid any erroneous data to be inserted into the database. So let us learn some basics because I have written this article only focusing on beginners and students. Example I hope you now understand the basics of validation in Java Script, now let us create the one sample web application that demonstrates how to do validation.

In this article we will learn about client-side validation that is done using Java Script. In the preceding syntax function is the keyword provided by the Java Script to declare a function and the Vildate Data() is the function name, now write the code inside the function as in the following.

In the given example we just write a message saying the all went well, however that part is where we should insert our main code which might be an insert command, an email forwarding or whatever you like.

The checks we've developed with the above code are very simple.

Net control's values in variables so it cannot be repeated again and again in our function the email Exp variable holds the pattern of the email id in the form of a regular expression.

Now add the condition to ensure that all controls have a value, if the values are not entered in the form control then it will show a message.

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!

There are two main methods for validating forms: (usually done using Java Script).