$(document).ready(function() { thumbnails = $('img[src*="/products/"]'); if (thumbnails.length) { thumbnails.bind('click', function(event) { var item = $(event.currentTarget); // Update the alternate selector var v = product_variant_map[item.data('variant-id')]; if ( v.option1 !== null ) { $('.single-option-selector:eq(0)').val(v.option1).trigger('change'); } if ( v.option2 !== null ) { $('.single-option-selector:eq(1)').val(v.option2).trigger('change'); } if ( v.option3 !== null ) { $('.single-option-selector:eq(2)').val(v.option3).trigger('change'); } }); } });