html5图片重力感应特效 图片重力感应，在网页上的图片像是海绵，会落下来，可以相互碰撞，鼠标可以拖动并把图片扔出去。很有意思的实例。 -html5 picture effects picture gravity sensing gravity sensor, the picture on the page like a sponge, it will fall, you can collide with each other, the mouse can be dragged a