我当时正在写一个 html 代码,我想将所有代码都“坚固”关闭为 < / 坚固 > 代码。 当我把它放入一个单一的 < code> > div 代码时, 它给了我一个错误, 我的标记是 < 坚固 > 无效 (显示关闭的 < code> div 标签是 < 坚固 > / 无效 > 。) 现在我很惊讶它怎么会无效。 请帮助我。
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Untitled Document</title>
</head>
<body>
<div>
<iframe width="350" height="350" src="http://www.youtube.com/embed/P3weDRMemD8" frameborder="0" allowfullscreen></iframe>
<form style="border:3px;text align.center;" action="http://feedburner.google.com/fb/a/mailverify" method="post" target="popupwindow" onsubmit= "window.open( http://feedburner.google.com/fb/a/mailverify?uri=financeyoga/UPqT , popupwindow , scrollbars=yes,width=550,height=520 );return true">
<input type="text" style="width:140px;padding:10px;" name="email"/>
<input type="hidden" value="financeyoga/UPqT" name="uri"/>
<input type="hidden" name="loc" value="en_US"/><br>
<input style="padding:10px;" type="submit" value="Submit Email Address" />
<img style="position:relative;top:325px; left:10px;" src="http://financeyoga.com/wp-content/uploads/2012/05/follow.png" width="143" height="64" border="0" usemap="#Map">
<map name="Map">
<area shape="rect" coords="5,18,33,44" href="www.twitter.com" target="_blank" alt="twitter">
<area shape="rect" coords="57,16,87,46" href="www.facebook.com" target="_blank" alt="facebook">
<area shape="rect" coords="107,16,137,46" href="plus.google.com" target="_blank" alt="google plus">
</map>
</div>
</body>
</html>