Help making an array of this simple shopping cart

[tommhans]

I made this simple shopping cart where you select quantity from a dropwdown list and these numbers get added and you get a total number for all the products and a total number for the product itself.

But i want it write the quantity with price and the name and write it in a div placed on the site so that it is easy for the user to see that he added a product. I made the calculating part by adding the products one by one, as i did not array them. But for this next part i just didn't find a way that suited my needs. This is just from my test page , so i only have a few values , but in the other page i have over 70 listed just like these:

 

<div id="radioAlert">

<script type="text/javascript">
//calculator
function updatesum() {
document.form.sum.value =
(document.form.sum0.value -0) *99 +
(document.form.sum1.value -0) *99 +
(document.form.sum2.value -0) *99;


document.form.smu.value =
(document.form.prod0.value -0)*99  +
(document.form.prod1.value -0) *99 +
(document.form.prod2.value -0) *99 +
(document.form.prod3.value -0) *99 +
(document.form.prod4.value -0) *99;
document.form.totalsum.value =
(document.form.sum.value -0) +
(document.form.smu.value -0); //not a typo i was just lazy with the name

//arrays

//This one i did not get to work.
var myArray = newArray();
myArray[0]=document.form.sum2.value;
myArray[1]=document.form.prod0.value;
myArray[2]=document.form.prod1.value;
myArray[3]=document.form.prod2.value;
myArray[4]=document.form.prod3.value;
myArray[5]=document.form.prod4.value;

for (var i = 0; i < myArray.length; i++) {
   alert(myArray[i]);
}
//this part works but i want it to add its value only once and then replace its value if its updated again, if its 0 i want it to be completely removed.
var prod1 = document.form.sum2.value;
var prod2 = document.form.sum1.value;
var radioAlert = document.getElementById("radioAlert");
var radioAlert2 = document.getElementById("radioAlert"); 
if  (document.form.sum2.value>0) {
//document.write("pilotjakke pelsforet small  " +   prod1 + "  stk");
radioAlert.innerHTML += ("pilotjakke pelsforet small  " +   prod1 + "  stk");
alert("pilotjakke pelsforet medium  " +   prod1 + "  stk");
}
if  (document.form.sum1.value>0) {
//document.write("pilotjakke pelsforet small  " +   prod1 + "  stk");
radioAlert2.innerHTML += ("pilotjakke pelsforet medium  " +   prod2 + "  stk");

}
}
</script>
</div>