js由下向上不斷上升冒氣泡效果實例

2024-05-06 16:19:39

字體：大中小

來源：轉載

供稿：網友

這篇文章主要介紹了js由下向上不斷上升冒氣泡效果,實例分析了javascript操作鼠標事件、圖片及樣式的相關技巧,需要的朋友可以參考下

本文實例講述了js由下向上不斷上升冒氣泡效果的方法。分享給大家供大家參考。具體實現方法如下：

<html>

<head>

<title>JS實現氣泡從水中急速上升效果</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://bbs.blueidea.com/static/image/smiley/blueidea/smile.gif">

<img src="http://bbs.blueidea.com/static/image/smiley/blueidea/biggrin.gif">

<img src="http://bbs.blueidea.com/static/image/smiley/blueidea/eek.gif">

<img src="http://bbs.blueidea.com/static/image/smiley/blueidea/rolleyes.gif">

</div>

</body>

</html>