I ran into an issue the other day where a client wanted multiple product prices on the product page. He wanted each of those product prices to update when the user would choose a product option. By default Magento supports this by an CSS ID for that div. So I created a jQuery bind on the element to update any other price fields that had a certain class name. Below is my jQuery code:
// multiple price updates
var productId = ‘<?php echo $_product->getId(); ?>’;
$(‘#product-price-‘+productId).bind(“DOMSubtreeModified”,function(){
var oldContent = $(‘#product-price-‘+productId).html();
$(‘.changeOtherPrice’).html(oldContent);
});