Importantance of returning false It's very important to use the return false statement after the condition block that return false so if validation determines that the business requirements are not met then the form cannot be submitted.If you do not return false then the message will be displayed to the user that all fields are required but the form will be post back and it gives you the second page directly. The condition that checks both text boxes for word are as in the following: In the preceding condition, first we ensure that the email id is not blank then we match the email id entered into the text box to the Regular Expression that is saved in the email Exp variable.Also, the values entered in the password and confirm password should be same.
Net controls values; they are:get Element By Id: this method is used to read the controls values by their Element By Name: this method is used to read the controls values by their Element By Tag Name: this method is used to read the controls values by their Tag Name.If you have any suggestion related to this article then please contact me.It is getting error in console please give me help.The Java Script class presented here makes the form validations many times easier.The script has a catalog of almost all the common validation types built-in.In this form I am using textboxes, a dropdown list, a text area and a checkbox for validation from a Java Script function and using some extra scripting like CSS and HTML for designing the form.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.I this article I explain how to validate a registration form using a Java Script function.The registration form fields are validated using a Java Script function. 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.Client side validation Validation done in the browser before sending the form data to the server using Java Script, j Query and VBScript is called client-side validation. Let us first create the web application with two web pages We are adding two web pages because our requirement is, in the first web page there is form data to be filled in by the user and only after validating the form data, the form will be redirected to the next page.