iMacros-如何抓取每个页面具有不同的类？

Question

如何抓取每个页面具有不同的类？

示例：

**- on page 1, it has class = "MdIco_A"**
**  - on page 2, it has class = "MdIco_B"**
**   - on page 3, it has class = "MdIco_C"**