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fangda.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
canvas{
float: left;
}
#aa{
height:300px;
width: 300px;
float:left;
overflow: hidden;
}
#aa img{
}
#cc{
position: absolute;
height: 50px;
width: 50px;
border: 1px solid #000000;
}
</style>
<script type="text/javascript">
window.onload=function(){
var aa=document.getElementById("aa");
var cc=document.getElementById("cc");
var can=document.getElementById("bb");
var tx=can.getContext("2d");
aa.onmousemove=function(e){
cc.style.left=(e.pageX-25)+"px";
cc.style.top=(e.pageY-25)+"px";
var xx=e.pageX-25;
var yy=e.pageY-25;
var aimg=new Image();
aimg.src="img/work11.jpg";
aimg.onload=function(){
tx.drawImage(aimg,xx,yy,50,50,0,0,300,300);
}
}
}
</script>
</head>
<body>
<div id="aa"><img src="img/work11.jpg"/></div>
<canvas id="bb" width="300px" height="300px" style="border: 1px solid red;"></canvas>
<div id="cc"></div>
</body>
</html>