阿飞—特效HTML5实现下雨、水波特效，一个动态水波的效果，主要是通过HTML5里面的canvas来实现。如果您想换一张背景图片，建议图片不要太大，本例子用400*300的图片在chrome和firefox下还算流畅，但是safari相对较卡。把图片扩大2倍至800*600就比较卡，效果不是很好。-Hooligan- Major HTML5 realize it rains, water effects, a dynamic wave effect, mainly through the inside of the HTML5 canvas to achieve. If you want to change a background image, the proposed images not too much, in this example 400* 300 pictures in chrome and firefox fairly smooth, but the safari relatively cards. The picture to expand two-fold to 800* 600 is more cards, the effect is not very good.