var qcanvas = new Qcanvas(["qcanvas",300,200]);
var polygon = qcanvas.qpolygon.polygon({
r:30,
num:6,
start:[100,100]
})
var shape = qcanvas.qshape.shape({
fillColor:'#999',
opacity:0.3,
points:function(){
return [
[80,10],
[80,50],
[150,70],
[160,20],
]
}
});