画笑脸p9

        var canvas=$('canvas')[0];
            function draw(){
                if (canvas.getContext) {
                    var ctx=canvas.getContext('2d');
                    ctx.beginPath(); //=>开始路径
                    ctx.arc(75,75,50,0,Math.PI*2,true);
                    ctx.moveTo(110,75); //=>75的一半 //=>开始点
                    ctx.arc(75,75,35,0,Math.PI);
                    ctx.moveTo(65,65);
                    ctx.arc(60,65,5,0,Math.PI*2);
                    ctx.moveTo(95,65);
                    ctx.arc(90,65,5,0,Math.PI*2);
                    ctx.stroke();
                }
            }