Canvas Tag

目前正在研究如何在浏览器中画图：直线，椭圆等等。在Google上搜了一把，发现了一个canvas的标签。这个标签可以完成大多数画图的任务。不过很不幸，IE不支持这个标签。不知道在IE下画图有什么快速的好办法，如果谁知道，麻烦告诉我。

Now, I study how to draw graphics in browser. I search by Google, and find canvas tag. This tag can finish much draw task. But unfortunately, IE does not support this tag. I do not know there are some quickly methods to draw under IE. If someone know, tell me.