<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<canvas id="canvas" width="1024" height="768" style="border:1px solid #aaa;display: block;margin: 20px auto;"><!-- 默认宽300像素，高150像素 -->
当前浏览器不支持canvas，请切换浏览器后再试;
</canvas>
<script type="text/javascript">
window.onload=function(){
var canvas=document.getElementById('canvas');
var context=canvas.getContext("2d");
canvas.width=1024;
canvas.height=768;
context.moveTo(100,100);
context.lineTo(700,700);
context.lineWidth=5px;
context.strokeStyle="#005588";
context.stroke();
}
</script>
</body>
</html>
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