ecshop商品颜色尺寸联动筛选功能实现方法

/*--------------颜色选择器CSS添加-------------*/
.catt{width:100%;height:auto;overflow:hidden;padding-bottom:5px;}
.catt a{border: #c8c9cd 1px solid; text-align: center; background-color: #fff; margin-left:5px;margin-top:6px;padding-left: 10px;padding-right: 10px;display: block; white-space: nowrap; color: #000; text-decoration: none;float:left;}
.catt a:hover {border:#ff6701 2px solid; margin: -1px; margin-left:4px;margin-top:5px;}
.catt a:focus {outline-style:none;}
.catt .cattsel {border:#ff6701 2px solid; margin: -1px;background: url("images/test.gif") no-repeat bottom right; margin-left:4px;margin-top:5px;}
.catt .cattsel a:hover {border: #ff6701 2px solid;margin:-1px;background: url("images/test.gif") no-repeat bottom right;}

<!-- {foreach from=$spec.values item=value key=key} -->
<label for="spec_value_{$value.id}">
<input type="radio" name="spec_{$spec_key}" value="{$value.id}" id="spec_value_{$value.id}" {if $key eq 0}checked{/if} onclick="changePrice()" />
{$value.label} [{if $value.price gt 0}{$lang.plus}{elseif $value.price lt 0}{$lang.minus}{/if} {$value.format_price|abs}] </label><br />
<!-- {/foreach} -->

<div class="catt">
<!-- {foreach from=$spec.values item=value key=key} -->
<a {if $key eq 0}class="cattsel"{/if} onclick="changeAtt(this)" href="javascript:;" name="{$value.id}" title="[{if $value.price gt 0}{$lang.plus}{elseif $value.price lt 0}{$lang.minus}{/if} {$value.format_price|abs}]">{$value.label}<input style id="spec_value_{$value.id}" type="radio" name="spec_{$spec_key}" value="{$value.id}" {if $key eq 0}checked{/if} /></a>
<!-- {/foreach} -->
</div>

function changeAtt(t) {
t.lastChild.checked='checked';
for (var i = 0; i<t.parentNode.childNodes.length;i++) {
if (t.parentNode.childNodes.className == 'cattsel') {
t.parentNode.childNodes.className = '';
}
}
t.className = "cattsel";
changePrice();
}