css positioning Parameters: position, left, right, top, bottom
Parameter description:
absolute Parameters are used to specify the positioning method of the block. Top, bottom, left, and right specify the up, down, left, and right coordinates of the block respectively.
Parameter value description.
absolute:Absolute positioning
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>示例网页</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<style>
.c1{
width:200px;
height:150px;
line-height:75px;
text-align:center;
border:1px solid #909;
position:absolute;
top:50px;
left:50px;
}
</style>
</head>
<body>
<div class="c1">
本方块宽200px,高150px，绝对定位于上边50px,左边50px
</div>
</body>
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