In this just make a form as follows:
Web URL :
Now on the source code of this form in script tag write the following code:
And in code behind file just write the below code.
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
btnSubmit.Attributes.Add("onclick", "return validate()")
Now you will get a form with proper validation.
I hope this is going to help you.