代码：
<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
*{
margin: 0;
padding: 0;
}
#box{
width: 400px;
height: 400px;
border: 1px solid red;
}
#div1{
width: 200px;
height: 200px;
background-color: #37A3EB;
margin-left:0;
}
</style>
</head>
<body>
<div id="box">
<div id="div1"></div>
</div>
<input type="button" value="往右移动300px" id="it6" />
<script>
window.onload=function(){
var div1=document.getElementById("div1");
var it6=document.getElementById("it6");
it6.onclick=function(){
div1.style.margin="margin-left:300px"
}
}
</script>
</body>
</html>
stone310
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