<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<canvas width="1000" height="1000"></canvas>
</body>
<script>
var ke=("canvas1");
var kellen=("2d");
var disk=new Image();
="img/";
=function(){ //这个地方不可以直接drawImage，亲自试过了
(disk,100,100,300,300);
}
/*截图，控制截图的范围*/
();
(100,200);
(100,300);
(200,300);
(200,200);
(); //别忘了加上closePtah（），否则对之后的画图可能会产生影响
();
</script>
</html>