<br /> <select name="filter_cat"> <p><option value="">< Select Category and Sub Category ></option></p> <p><option value="11" style="font-weight: bold; border-bottom: 1px solid gray;">Widget</option></p> <p><option value="12" class="subcat">blue widget</option></p> <p><option value="13" class="subcat">green widget</option></p> <p><option value="14" class="subcat">yellow widgets</option></p> </select> </form> <p> [Ctrl+A 全部选择 提示：你可先修改部分代码，再按运行]

The code above works as intended for FF, but in IE the bolding style does not work, only the indent and the background color.