<html>
<head>
<style>
h1.ex1
{
position:relative;
left:20px;
}
h1.ex2
{
position:relative;
left:-20px;
}
</style>
</head>
<body>
<h1>Normal Heading</h1>
<h1 class="ex1">Heading +20</h1>
<h1 class="ex2">Heading -20</h1>
<p>鐩稿瀹氫綅鐩稿浜庡厓绱犵殑姝e父浣嶇疆瀵瑰叾杩涜绉诲姩銆�</p>
<p>"left:20" 缁欏厓绱犵殑 LEFT 浣嶇疆澧炲姞 20 鍍忕礌銆�</p>
<p>"left:-20" 浠庡厓绱犵殑 LEFT 浣嶇疆鍑忓幓 20 鍍忕礌銆�</p>
</body>
</html>