html5学习笔记：canvas

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7  //创建画布用canvas标签
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 1 var can=document.getElementById("mycanvas");
 2 var draw=can.getContext("2d");
 3 // 开始一个路径
 4 draw.beginPath();
 5 // 设置线的粗细
 6 draw.lineWidth="5";
 7 //设置线的颜色
 8 draw.strokeStyle="green";
 9 // 线的起点
10 draw.moveTo(0,75);
11 //线的终点 
12 draw.lineTo(250,75);
13 // 开始绘制路径
14 draw.stroke();
15 //开始另一个路径
16 draw.beginPath();
17 // 设置线的粗细
18 draw.lineWidth="5";
19 draw.strokeStyle="purple";
20 draw.moveTo(25,05);
21 draw.lineTo(35,25);
22 draw.stroke();