循环气泡随机上升的JS特效代码

2024-09-05 12:18:15

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循环气泡随机上升的JS特效代码，一个很好玩的效果，打开网页即可看到效果，不再多说了，大家点击“运行代码”按钮看看效果吧。

<html><head><title>JS实现气泡从水中急速上升效果</title><style type="text/css">body {cursor:crosshair;margin:0; padding:0; position:absolute; overflow:hidden; background:#FFF; left:0; top:0; width:100%; height:100%;}</style><script type="text/javascript">var object = new Array();nbfm   = 60;var xm = 0;var ym = 9999;var nx = 0;var ny = 0;function movbulb(){	with (this) {		if(ec < 20){			if(Math.abs(x0 - xm) < 100 && Math.abs(y0 - ym) < 100){				xx = (xm - x0) / 8;				yy = (ym - y0) / 8;				ec++;			}		}		xx *= 0.99;		yy *= 0.99;		x0 = Math.round(x0 + Math.cos(y0 / 15) * p) + xx;		y0+= yy - v;		if(y0 < -h * 2 || x0 < -w * 2 || x0 > nx + w * 2){			y0 = ny + N + h * 2;			x0 = nx/2-100 + Math.random() * 100;			ec = 0;		}		obj.style.top  = y0 - h;		obj.style.left = x0 - w;	}}function CObj(N,img,w,h){	this.obj = document.createElement("img");	this.obj.src = img.src;	this.obj.style.position = "absolute";	this.obj.style.left = -1000;	document.body.appendChild(this.obj);	this.N  = N;	this.x0 = 0;	this.y0 = -1000;	this.v  = 1 + Math.round((80 / h) * Math.random());	this.p  = 1 + Math.round((w / 8) * Math.random());	this.xx = 0;	this.yy = 0;	this.ec = 0;	this.w  = w;	this.h  = h;	this.movbulb = movbulb;}function resize(){	nx = document.body.offsetWidth;	ny = document.body.offsetHeight;}onresize = resize;document.onmousemove = function(e){	if (window.event) e = window.event;	xm = document.body.scrollLeft+(e.x || e.clientX);	ym = document.body.scrollTop+(e.y || e.clientY);}function run(){	for(i in object)object[i].movbulb();	setTimeout(run, 16);}onload = function() {	PIC = document.getElementById("bubbles").getElementsByTagName("img");	resize();	for(nbf=0;nbf<nbfm;nbf++){		sf = PIC[nbf%PIC.length];		object[nbf] = new CObj(nbf,sf,sf.width/2,sf.height/2);	}	run();}</script></head><body><div id="bubbles" style="visibility:hidden">	<img src="http://www.codefans.net/jscss/demoimg/201111/smile.gif">	<img src="http://www.codefans.net/jscss/demoimg/201111/biggrin.gif">	<img src="http://www.codefans.net/jscss/demoimg/201111/eek.gif"></div></body></html>

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