The problem of negative numbers being hidden when margin-bottom is set under IE6_html/css_WEB-ITnose

Think of these tabs, the desired effect is as follows

But the bottom border of the current tab in IE6 It will not cover the bottom border of the parent element. It is said on the Internet that the parent element has to start haslayout, but it doesn't work. Finally, set margin-bottom:-1px; position:relative; in the tab element at the same time to solve the problem.

What should be noted here is that the height of the tab element must be 1px greater than the height of the parent element.

My code is as follows:

<ul class="tabs">        <li class="tab cur"><a href="?id=435">?????? ???????</a></li>        <li class="tab "><a href="?id=434">????????????</a></li>    </ul>

ul.tabs{display:block; padding:0 10px 0 0; margin:25px 0 0 0; height:35px; border-bottom:solid 1px #ccc; line-height:35px;}ul.tabs li{display:block; float:right; padding:0 10px; margin:0; list-style:none;}ul.tabs li.cur{ border:solid 1px #ccc; border-bottom-color:#fff; background-color:#fff; height:34px; margin-bottom:-1px; position:relative;}