How to use Java Script [ Client-side Validations ]
Java script is one of the script language.Java script is easy to learn..It is lightwaight object oriented programming language. This javascript is integrated with HTMLs and cross-platform.It works in client side.The JavaScript code is executed when the user submits the form, and only if all the entries are valid they would be submitted to the Web Server. If you want to implement the javascript we are using one tag i.e <script language="javascript"> </script> it is write in header part.