我想替换最后一个出现的
我将上面的HTML存储在一个字符串变量中。我应该怎么做才能实现这个功能。
<li>
标签,并在其中添加class属性,它应该如下所示:<li class="last">
。<li><span>Vislink Acquires Gigawave for US$6 Million </span></li>
<li><span>Newegg Offers $25 7-inch DTV</span></li>
<li><span>The Hope of Broadcasters </span></li>
<li><span>ICANN Approves Custom Domain Extensions </span></li>
<li><span>Sciences Ending U.S. Sales </span></li>
<li><span>LightSquared Proposes Plan to </span></li>
<li><span>Wimbledon Gets 3D upgrade </span></li>
<li><span>The Hope of Broadcasters </span></li>
<li><span>LightSquared Proposes Plan to </span></li>
<li class="last"><span> Newegg Offers $25 7-inch DTV </span></li>
我将上面的HTML存储在一个字符串变量中。我应该怎么做才能实现这个功能。