/**
 * Good old Javascript
 */
var className = ''

function getElement(id) {
    if (document.getElementById != null) {
        return document.getElementById(id)
    }
    else {
        return document.all[id]
    }
}

function updateQuantities() {
    document.forms['cart'].action.value = 'update';
    return true;
}

function deleteProduct(id) {
    getElement(id).value = 0;
    return updateQuantities();
}

function billing() {
    elem = document.getElementById('billing')
    if (elem.style.visibility == 'hidden') {
        elem.style.visibility = 'visible'
        elem.style.display = 'block'
    }
    else {
        elem.style.visibility = 'hidden'
        elem.style.display = 'none'
    }
}