复制代码 代码如下:

<canvas id="myCanvas" width=”300” height=”200”>

Your browser does not support the canvas element.

</canvas>

<script type="text/javascript">

var myCanvas = document.getElementById("myCanvas");

if (!myCanvas.getContext)

{

alert("你的浏览器不支持Canvas.");

}

else

{

alert("你的浏览器支持Canvas.");

}

</script>