我的产品以网格格式显示，并直接从此页面购买。它们是带有自定义选项的简单产品。每个选项都是一种颜色。是否有被选择的下拉为相关色时的图像分配给每个产品/颜色组合并显示图像的方法吗？

 ` <?php $_collectionSize = $_productCollection->count() ?>
    <?php $_columnCount = $this->getColumnCount(); ?>
    <?php $i=0; foreach ($_productCollection as $_product): ?>
        <?php if ($i++%$_columnCount==0): ?>
        <ul class="products-grid">
        <?php endif ?>
            <li class="productthumb" item<?php if(($i-1)%$_columnCount==0): ?> first<?php elseif($i%$_columnCount==0): ?> last<?php endif; ?>">
<a href="<?php echo $this->helper('catalog/image')->init($_product, 'small_image')->resize(600); ?>" rel="lightbox" title="<?php echo $_helper->productAttribute($_product, $_product->getName(), 'name') ?>" />
               <img src="<?php echo $this->helper('catalog/image')->init($_product, 'small_image')->resize(220); ?>" width="220" height="160" alt="<?php echo $this->stripTags($this->getImageLabel($_product, 'small_image'), null, true) ?>" /></a>
                <h2 class="product-name"><?php echo $_helper->productAttribute($_product, $_product->getName(), 'name') ?></h2>
                <?php if($_product->getRatingSummary()): ?>
                <?php echo $this->getReviewsSummaryHtml($_product, 'short') ?>
                <?php endif; ?>
                <?php echo $this->getPriceHtml($_product, true) ?>
                <form action="<?php echo Mage::getBaseUrl(); ?>checkout/cart/add/" method="post" style="display:block; clear:both;"> 
`