position 定位
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>position</title>
<style type="text/css">
body{
margin: 0;
margin-left: 100px;
}
img{
height: 150px;
width: 200px;
top: 50px;
left: 100px;
border: #000000 medium double;
}
</style>
</head>
<body>
<p>1</p>
<hr />
<img src="../img/12.jpg" id="img1" alt="bentely"/>
<hr />
<p>1</p><p>1</p><p>1</p><p>1</p><p>1</p>
<p>
<button>static</button>
<button>relative</button>
<button>absolute</button>
<button>fixed</button>
</p>
<script>
var buttons=document.getElementsByTagName("button");
for(var i=0;i<buttons.length;i++){
buttons[i].onclick=function(e){
document.getElementById("img1").style.position=
e.target.innerHTML;
}
}
</script>
</body>
</html>
static:

relative:(相对于它正常的位置进行定位)

absolute:(绝对定位,相对于它最近的一个position值不为static的父元素进行定位。脱离正常文档流)


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