How do you set an alert to make sure that the user has selected a radio button as well as entered some amount of information into the contact details section. Below is the example html and javascript.

Make your Pie!

Size Of Pie

6" Pie - serves 8 people ($20)

8" Pie - serves 12 people ($25)

10" Pie - serves 16 people($35)

12" Pie - serves 30 people($75)

Filling

Select Filling

Lemon($5)

Custard($5)

Fudge($7)

Mocha($8)

Raspberry($10)

Pineapple($5)

Dobash($9)

Mint($5)

Cherry($5)

Apricot($8)

Buttercream($7)

Chocolate Mousse($12)

Include Whipcream($5)

Personalize your Pie($20)

Contact Details

Name

Address

Phone Number

Return to Class Menu

var cake_prices = new Array();

cake_prices["Round6"]=20;

cake_prices["Round8"]=25;

cake_prices["Round10"]=35;

cake_prices["Round12"]=75;

var filling_prices= new Array();

filling_prices["None"]=0;

filling_prices["Lemon"]=5;

filling_prices["Custard"]=5;

filling_prices["Fudge"]=7;

filling_prices["Mocha"]=8;

filling_prices["Raspberry"]=10;

filling_prices["Pineapple"]=5;

filling_prices["Dobash"]=9;

filling_prices["Mint"]=5;

filling_prices["Cherry"]=5;

filling_prices["Apricot"]=8;

filling_prices["Buttercream"]=7;

filling_prices["Chocolate Mousse"]=12;

function getCakeSizePrice()

{

var cakeSizePrice=0;

var theForm = document.forms["cakeform"];

var selectedCake = theForm.elements["selectedcake"];

for(var i = 0; i < selectedCake.length; i++)

{

if(selectedCake[i].checked)

{

cakeSizePrice = cake_prices[selectedCake[i].value];

break;

}

}

return cakeSizePrice;

}

function getFillingPrice()

{

var cakeFillingPrice=0;

var theForm = document.forms["cakeform"];

var selectedFilling = theForm.elements["filling"];

cakeFillingPrice = filling_prices[selectedFilling.value];

return cakeFillingPrice;

}

function candlesPrice()

{

var candlePrice=0;

var theForm = document.forms["cakeform"];

var includeCandles = theForm.elements["includecandles"];

if(includeCandles.checked==true)

{

candlePrice=5;

}

return candlePrice;

}

function insciptionPrice()

{

var inscriptionPrice=0;

var theForm = document.forms["cakeform"];

var includeInscription = theForm.elements["includeinscription"];

if(includeInscription.checked==true){

inscriptionPrice=20;

}

return inscriptionPrice;

}

function calculateTotal()

{

var cakePrice = getCakeSizePrice() + getFillingPrice() + candlesPrice() + insciptionPrice();

var divobj = document.getElementById('totalPrice');

divobj.style.display='block';

divobj.innerHTML = "Total Price For the Pie $"+cakePrice;

}

function hideTotal()

{

var divobj = document.getElementById('totalPrice');

divobj.style.display='none';

}