QUESTION

(a) Define four special target names use with the TARGET attribute

(b) Explain the main difference between an HTML and an XHTML page

(c) Give two merits and two demerits of using frames in a web site

(d) Write a JavaScript program to prompt the user for the radius of a sphere and call function sphereVolume to calculate and display the volume of the sphere in the status bar. Use the formula

                                       Volume=( 4.0 / 3.0 ) * Math.PI * Math.pow(radius, 3)

to calculate the volume. The user should input the radius through a text field and press the button "Compute" to initiate the calculation