Construct/Calculation Problem with Java Script file

Hello,

I am having problems with the java script code below. I want the calculation to multiply by the number of members, and then give the members 10% off for multiple memberships. Also give them an extra 10% off for any membership of 3 years or more. Here is my code and thanks for the help.

// membership.js// This script calculates the cost of a membership.// Function called when the form is submitted.// Function performs the calculation and returns false.function calculate() { // Be strict: 'use strict'; // Variable to store the total cost: var cost; // Get a reference to the form elements: var type = document.getElementById('type'); var years = document.getElementById('years'); var members = document.getElementById('members'); // Convert the year to a number: if (years && years.value) { years = parseInt(years.value, 10); } // Convert the members to a number: if (members && members.value) { members = parseInt(members.value, 10); } // Check for valid data: if (type && type.value && years && (years > 0) ) { // Determine the base cost: switch (type.value) { case 'basic': cost = 10.00; break; case 'premium': cost = 15.00; break; case 'gold': cost = 20.00; break; case 'platinum': cost = 25.00; break; } // End of switch. // Factor in the number of years: cost *= years; // Discount multiple years: if (years > 2) { cost *= .90; // 90% or 10% off for membership 3 years or more } // Discount multiple members: if (members > 1) { cost *= .90; // 90% or 10% off for multiple members } // Show the total amount: document.getElementById('cost').value = '$' + cost.toFixed(2); } else { // Show an error: document.getElementById('cost').value = 'Please enter valid values.'; } // Return false to prevent submission: return false;} // End of calculate() function.// Initial setup:function init() { 'use strict'; document.getElementById('theForm').onsubmit = calculate;} // End of init() function.window.onload = init;

Cannot see anything wrong, where are you seeing it go wrong?
Only thing that is confusing is do you want 10% applied after already taking 10% off or should it be a total of 20%?

Thanks for displaying the code. I did run into a problem. When I ran the code for Years = 1, and Members = 2, and a Basic type, I got $9.00. Should it be $18? 10% 0ff for each $10 membership? thanks

Only thing that is confusing is do you want 10% applied after already taking 10% off or should it be a total of 20%?