tryhtml5_canvas_fillstyle_gradient3 在线代码实例

 <canvas id="myCanvas" width="300" height="150" style="border:1px solid #d3d3d3;">
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</canvas>
<script>
var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
var grd=ctx.createLinearGradient(0,0,170,0);
grd.addColorStop(0,"black");
grd.addColorStop(0.5,"red");
grd.addColorStop(1,"white");
ctx.fillStyle=grd;
ctx.fillRect(20,20,150,100);
</script>