display: none">实例如下：
<div class="jb51code">
<pre class="brush:js;">
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml>
<html xmlns="http://www.w3.org/1999/xhtml">
display: none">实例如下：
<div class="jb51code">
<pre class="brush:js;">
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml>
<html xmlns="http://www.w3.org/1999/xhtml">