老師我的?？伾呛谏?/h1>

var?aneObj?=?function()
{
	this.x?=?[];
	this.len?=?[];
}
aneObj.prototype.num?=50;
aneObj.prototype.init?=?function()
{
	for?(var?i?=?0;?i?<?this.num;?i++)?{
		this.x[i]?=?i?*?16?+?Math.random()?*?20;//[0,1)?
????????this.len[i]?=?200?+?Math.random()?*?50;
	}
}	
aneObj.prototype.draw?=?function()
{???
????ctx2.save();?
????ctx2.globalAlbha?=?0.6;
	for?(var?i?=?0;?i?<?this.num;?i++)?{
		//beginPath,moveTo,linTo,stroke,starokeStyle,linewidth,lineCap,globalAlbha
		ctx2.beginPath();
		ctx2.moveTo(this.x[i],canHeight);
		ctx2.lineTo(this.x[i],canHeight?-?this.len[i]);
		ctx2.lineWidth?=?20;
		ctx2.lineCap?=?"round";
		ctx2.starokeStyle?=?"#3b154e";
		ctx2.stroke();
	}
	ctx2.restore();
}