Basic Help Needed!

[bulbface]

Hi, Im new to javascript and this forum and was wondering if someone could help with this issue;

This is the html/php element (within a form called orderForm)

    echo "\t<div class='item'>
            <span class=gameTitle>{$book[gameTitle]}</span>
            <span class='relYear'>{$book['relYear']}</span>
            <span class='genDesc'>{$book['genDesc']}</span>
            <span class=’price’>{$book['price']}</span>
            <span class='chosen'><input type='checkbox' name='game[]' value='{$game['gameID']}' title='{$game['price']} id='price' /></span>
        </div>\n";

All I'm wanting to do is to add up the total of the selected game checkboxes. I find JS quite tricky to get my head around. So far I have this (don't laugh);

function totalPrice(price)
{
var money = document.orderForm.price.title;
var working = 0;
var total = 0;
if (price.checked)
{
money+working
}
document.write
}

I've been at this for hours and haven't made any head way, any ideas are welcomed!

[nap0leon]

For checkboxes and radio buttons, I find a helper function to be very useful.

Here is one that I use in a demo on my site @ http://wwwjasondahlin.com/2011/codin...validation.asp

function getCheckedValue(radioName) {
    var radioObj = document.getElementsByName(radioName);
    if(!radioObj)
        return "";
    var radioLength = radioObj.length;
    if(radioLength == undefined)
        if(radioObj.checked)
            return radioObj.value;
        else
            return "";
    for(var i = 0; i < radioLength; i++) {
        if(radioObj[i].checked) {
            return radioObj[i].value;
        }
    }
    return "";
}

You pass it the name of the checkbox (or radio-button group) that you want the value for, and it returns either a value or (blank).

e.g.,
If you have checkboxes named cbx1 and cbx 2 and the value for each is a number, you can get the sum of the checked checkboxes like this:

var valCBX1 = parseFloat(getCheckedValue(cbx1)) 
var valCBX2 = parseFloat(getCheckedValue(cbx2))
var total = valCBX1 + valCBX2;
alert(total);