与大家分享几个有关canvas的代码（一）
第一个
<!DOCTYPE html><html><body><canvas id="myCanvas" width="200" height="100" style="border:1px solid #c3c3c3;">Your browser does not support the HTML5 canvas tag.</canvas><script type="text/javascript">var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.fillStyle="#FF0000";ctx.fillRect(0,0,150,75);</script></body></html>第二个
<!DOCTYPE html><html><body><canvas id="myCanvas" width="200" height="100" style="border:1px solid #c3c3c3;">Your browser does not support the HTML5 canvas tag.</canvas><script type="text/javascript">var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.moveTo(10,10);ctx.lineTo(150,50);ctx.lineTo(10,50);ctx.stroke();</script></body></html>第三个
<!DOCTYPE html><html><body><canvas id="myCanvas" width="200" height="100" style="border:1px solid #c3c3c3;">Your browser does not support the HTML5 canvas tag.</canvas><script type="text/javascript">var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");var grd=ctx.createLinearGradient(0,0,175,50);grd.addColorStop(0,"#FF0000");grd.addColorStop(1,"#00FF00");ctx.fillStyle=grd;ctx.fillRect(0,0,175,50);</script></body></html>