Home > Article > Web Front-end > javascript实现网页背景烟花效果的方法_javascript技巧
javascript实现网页背景烟花效果的方法_javascript技巧
- WBOYOriginal
- 2016-05-16 15:46:391271browse
本文实例讲述了javascript实现网页背景烟花效果的方法。分享给大家供大家参考。具体如下：
这里的网页背景烟花爆炸特效，不用说是用Js实现的，配合黑色背景效果最好，五颜六色的烟花效果，四散的烟花效果，以前发过一些网页上的烟花特效，本款类似，但代码更简洁。
运行效果如下图所示：
具体代码如下：
<html>
<head>
<title>背景的烟花效果</title>
<style type="text/css">
<!--
body {
background-color: #000000;
}
-->
</style></head>
<body>
<script language="JavaScript">
var col = new Array('#ffffff','#fff000','#ffa000','#ff00ff','#00ff00','#0000ff','#ff0000');
var p='<div id="rearDiv" style="position:absolute;top:0px;left:0px">';
var n=0;
for (i=0;i<14;++i){
n++;
if (n=(col.length-1)) n=0;
p=p+'<div style="position:relative;width:1px;height:1px;background:'+col[n]+';font-size:3px">.</div>';
}
p=p+"</div>";
document.write(p);
var Clrs = new Array('ff0000','00ff00','000aff','ff00ff','ffa500','ffff00','00ff00','ffffff','fffff0');
var sClrs = new Array('ffa500','55ff66','AC9DFC','fff000','fffff0');
var peepY;
var peepX;
var step = 5;
var tallyStep = 0;
var backColor = 'ffa000';
var Mtop = 250;
var Mleft = 250;
function dissilient() {
peepY = window.document.body.clientHeight/3;
peepX = window.document.body.clientWidth/8;
enlarge();
tallyStep+= step;
reduce();
T=setTimeout("dissilient()",20);
}
function enlarge(){
for ( i = 0 ; i < rearDiv.all.length ; i++ ) {
var c=Math.round(Math.random()*(Clrs.length-1));
if (tallyStep < 90)
rearDiv.all[i].style.background=backColor;
if (tallyStep > 90)
rearDiv.all[i].style.background=Clrs[c];
rearDiv.all[i].style.top = Mtop + peepY*Math.sin((tallyStep+i*5)/3)*Math.sin(550+tallyStep/100);
rearDiv.all[i].style.left = Mleft + peepY*Math.cos((tallyStep+i*5)/3)*Math.sin(550+tallyStep/100);
}
}
function reduce(){
if (tallyStep == 220) {
tallyStep = -10;
var k=Math.round(Math.random()*(sClrs.length-1));
backColor = sClrs[k];
Dtop = window.document.body.clientHeight - 250;
Dleft = peepX * 3.5;
Mtop = Math.round(Math.random()*Dtop);
Mleft = Math.round(Math.random()*Dleft);
document.all.rearDiv.style.top = Mtop+document.body.scrollTop;
document.all.rearDiv.style.left = Mleft+document.body.scrollLeft;
if ((Mtop < 20) || (Mleft < 20)) {
Mtop += 90;
Mleft += 90;
}
}
}
dissilient();
</script>
</body>
</html>
希望本文所述对大家的javascript程序设计有所帮助。
Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：js实现简单的秒表走动的时钟特效_javascript技巧Next article：javascript实现鼠标放上后下边对应内容变换的效果_javascript技巧