This is the source code Christina Mihelakakis & Payton Hunter wrote for this project
<SCRIPT LANGUAGE = "JavaScript">
<!--
var choice = prompt("Do you wish to figure the circumference or the area of a circle:\n1. area +\n2. circumference -\n", "");
var x = parseFloat(prompt("Radius: ", ""));
if (choice == "area" || choice == "+" || choice == "1")
document.write(x + " * " + x + " * " + " 3.14 " + "= " + (x*x*3.14));
else if (choice == "circumference" || choice == "-" || choice == "2")
document.write(" 2 * 3.14 * " + x + " = " + (2*3.14*x));
else
document.write("Sorry! I don't recognize your choice.");
//-->
</SCRIPT>