Accessing Forms
--One of the reason popularity javascript is that javascript has built in ability to access forms
 --Javascript has ability to form validation
--Whenever we add an form in xhtml javascript automatically create form objects
 --JavaScript has unique way to identify form elements
--Whenever javascript sees the form then javascript creates the form automatically
--If we have 8 different javascript creates 8 arrays against 8 different forms the first form array 0 the second form array index 1 and so on
 --The form is a part of the document; document is basically part of the web page
Make a simple Calculator using JavaScript.
Simple Calculator based on If-Else Statement.