MktoLPs :: Show/Hide Block

HTML

<div class="productList product1 product2 product3">
    <div class="product product1">Product1</div>
    <div class="product product2">Product2</div>
    <div class="product product3">Product3</div>
</div>
<div class="productList product2">
    <div class="product product1">Product1</div>
    <div class="product product2">Product2</div>
    <div class="product product3">Product3</div>
</div>

CSS

DIV.productList 
{
    padding: 5px;
    margin: 5px;
    border: 1px solid purple;
}

DIV.product 
{
    display: none;
}

DIV.productList.product1 DIV.product1,
DIV.productList.product2 DIV.product2, 
DIV.productList.product3 DIV.product3 
{
    display: block;
}