Magento - Show simple product image and description
Product.Config.prototype.reloadPrice = function() {
var childProductId = this.getMatchingSimpleProduct();
var childProducts = this.config.childProducts;
var attribID = 158;
var kleurproductDropdown = document.getElementById('attribute' + attribID);
var kleurproductSelectedIndex = kleurproductDropdown.selectedIndex;
var kleurproduct_value  = kleurproductDropdown.options[kleurproductSelectedIndex].text;
//if the price ranges option is checked in the backend then a colon and the price is added to the dropdown
if (kleurproduct_value.indexOf(':') > -1) {
    kleurproduct_value = kleurproduct_value.substr(0,kleurproduct_value.indexOf(':'));
}
var usingZoomer = false;
if(this.config.imageZoomer){
    usingZoomer = true;
}

if (childProductId){
    var price = childProducts[childProductId]["price"];
    var finalPrice = childProducts[childProductId]["finalPrice"];
    optionsPrice.productPrice = finalPrice;
    optionsPrice.productOldPrice = price;
    optionsPrice.reload();
    optionsPrice.reloadPriceLabels(true);
    optionsPrice.updateSpecialPriceDisplay(price, finalPrice);
    this.updateProductShortDescription(childProductId);
    this.updateProductDescription(childProductId);
    this.updateProductName(childProductId);
    this.updateProductAttributes(childProductId);
    this.updateFormProductId(childProductId);
    this.addParentProductIdToCartForm(this.config.productId);
    this.showCustomOptionsBlock(childProductId, this.config.productId);
    if (usingZoomer) {
        this.showFullImageDiv(childProductId, this.config.productId);
    }else{
        this.updateProductImage(childProductId);
    }

}
//added else if for when just a kleurproduct is selected
else if (kleurproduct_value) {
    for (var product in childProducts) {
        //find the kleurproduct attribute in the childProduct html
        var colStartPos = childProducts[product].productAttributes.indexOf('<th class="label">kleurproduct</th>')
        colStartPos = childProducts[product].productAttributes.indexOf('>', colStartPos + 28)
        var colEndPos = childProducts[product].productAttributes.indexOf('</td>', colStartPos)
        //check each child product for matching kleurproduct
        if (childProducts[product].productAttributes.substr(colStartPos + 1, colEndPos - colStartPos - 1)==kleurproduct_value) {
            childProductId = product;
            var price = childProducts[childProductId]["price"];
            var finalPrice = childProducts[childProductId]["finalPrice"];
            optionsPrice.productPrice = finalPrice;
            optionsPrice.productOldPrice = price;
            optionsPrice.reload();
            optionsPrice.reloadPriceLabels(true);
            optionsPrice.updateSpecialPriceDisplay(price, finalPrice);
            this.updateProductShortDescription(childProductId);
            this.updateProductDescription(childProductId);
            this.updateProductName(childProductId);
            this.updateProductAttributes(childProductId);
            this.updateFormProductId(childProductId);
            this.addParentProductIdToCartForm(this.config.productId);
            this.showCustomOptionsBlock(childProductId, this.config.productId);
            if (usingZoomer) {
                this.showFullImageDiv(childProductId, this.config.productId);
            }else{
                this.updateProductImage(childProductId);
             }
            //one product was found, exit the loop
            break;
         }
    }
}
else {
    var cheapestPid = this.getProductIdOfCheapestProductInScope("finalPrice");
    //var mostExpensivePid = this.getProductIdOfMostExpensiveProductInScope("finalPrice");
    var price = childProducts[cheapestPid]["price"];
    var finalPrice = childProducts[cheapestPid]["finalPrice"];
    optionsPrice.productPrice = finalPrice;
    optionsPrice.productOldPrice = price;
    optionsPrice.reload();
    optionsPrice.reloadPriceLabels(false);
    optionsPrice.updateSpecialPriceDisplay(price, finalPrice);
    this.updateProductShortDescription(false);
    this.updateProductDescription(false);
    this.updateProductName(false);
    this.updateProductAttributes(false);
    this.showCustomOptionsBlock(false, false);
    if (usingZoomer) {
        this.showFullImageDiv(false, false);
    }else{
        this.updateProductImage(false);
    }
}