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Javascript网页特效:闪现的礼花背景
来源:易贤网 阅读:765 次 日期:2015-03-18 11:10:47
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很老的效果了,但对于一些生手来说还是很有用处的。

把如下代码加入<body>区域中

以下是引用片段:

<layer name="a0" left=10 top=10 visibility=show bgcolor="#ffffff" clip="0,0,1,1"></layer>

<layer name="a1" left=10 top=10 visibility=show bgcolor="#fff000" clip="0,0,1,1"></layer>

<layer name="a2" left=10 top=10 visibility=show bgcolor="#ffa000" clip="0,0,1,1"></layer>

<layer name="a3" left=10 top=10 visibility=show bgcolor="#ff00ff" clip="0,0,1,1"></layer>

<layer name="a4" left=10 top=10 visibility=show bgcolor="#00ff00" clip="0,0,1,1"></layer>

<layer name="a5" left=10 top=10 visibility=show bgcolor="#ff00ff" clip="0,0,1,1"></layer>

<layer name="a6" left=10 top=10 visibility=show bgcolor="#ff0000" clip="0,0,1,1"></layer>

<layer name="a7" left=10 top=10 visibility=show bgcolor="#ffffff" clip="0,0,1,1"></layer>

<layer name="a8" left=10 top=10 visibility=show bgcolor="#fff000" clip="0,0,1,1"></layer>

<layer name="a9" left=10 top=10 visibility=show bgcolor="#ffa000" clip="0,0,1,1"></layer>

<layer name="a10" left=10 top=10 visibility=show bgcolor="#ff00ff" clip="0,0,1,1"></layer>

<layer name="a11" left=10 top=10 visibility=show bgcolor="#00ff00" clip="0,0,2,2"></layer>

<layer name="a12" left=10 top=10 visibility=show bgcolor="#0000ff" clip="0,0,2,2"></layer>

<layer name="a13" left=10 top=10 visibility=show bgcolor="#ff0000" clip="0,0,2,2"></layer>

<div id="starsDiv" style="position:absolute;top:0px;left:0px">

<div style="position:relative;width:2px;height:2px;background:#ffffff;font-size:2px"></div>

<div style="position:relative;width:1px;height:1px;background:#fff000;font-size:1px"></div>

<div style="position:relative;width:1px;height:1px;background:#ffa000;font-size:1px"></div>

<div style="position:relative;width:1px;height:1px;background:#ff00ff;font-size:1px"></div>

<div style="position:relative;width:1px;height:1px;background:#00ff00;font-size:1px"></div>

<div style="position:relative;width:1px;height:1px;background:#0000ff;font-size:1px"></div>

<div style="position:relative;width:1px;height:1px;background:#FF0000;font-size:1px"></div>

<div style="position:relative;width:1px;height:1px;background:#ffffff;font-size:1px"></div>

<div style="position:relative;width:1px;height:1px;background:#fff000;font-size:1px"></div>

<div style="position:relative;width:1px;height:1px;background:#ffa000;font-size:1px"></div>

<div style="position:relative;width:1px;height:1px;background:#ff00ff;font-size:1px"></div>

<div style="position:relative;width:2px;height:2px;background:#ff00ff;font-size:2px"></div>

<div style="position:relative;width:1px;height:1px;background:#0000ff;font-size:1px"></div>

<div style="position:relative;width:1px;height:1px;background:#FF0000;font-size:1px"></div>

</div>

<SCRIPT LANGUAGE="JavaScript">

<!-- Begin

var Clrs = new Array(9);

Clrs[0] = 'ff0000';

Clrs[1] = '00ff00';

Clrs[2] = '000aff';

Clrs[3] = 'ff00ff';

Clrs[4] = 'ffa500';

Clrs[5] = 'ffff00';

Clrs[6] = '00ff00';

Clrs[7] = 'ffffff';

Clrs[8] = 'fffff0';

var sClrs = new Array(5);

sClrs[0] = 'ffa500';

sClrs[1] = '55ff66';

sClrs[2] = 'AC9DFC';

sClrs[3] = 'fff000';

sClrs[4] = 'fffff0';

var yBase;

var xBase;

var step;

var currStep = 0;

var Xpos = 1;

var Ypos = 1;

var initialStarColor = 'ffa000';

var Mtop = 250;

var Mleft = 250;

function Fireworks() {

if (document.all) {

yBase = window.document.body.offsetHeight / 3;

xBase = window.document.body.offsetWidth / 8;

}

else if (document.layers) {

yBase = window.innerHeight / 3;

xBase = window.innerWidth / 8;

}

if (document.all) {

step = 5;

for ( i = 0 ; i < starsDiv.all.length ; i++ ) {

for (ai = 0; ai < Clrs.length; ai++) {

var c = Math.round(Math.random()*[ai]);

}

if (currStep < 90)

starsDiv.all[i].style.background=initialStarColor;

if (currStep > 90)

starsDiv.all[i].style.background=Clrs[c];

starsDiv.all[i].style.top = Mtop + yBase*Math.sin((currStep+i*5)/3)*Math.sin(550+currStep/100)

starsDiv.all[i].style.left = Mleft + yBase*Math.cos((currStep+i*5)/3)*Math.sin(550+currStep/100)

}

}

else if (document.layers) {

step = 5;

for ( j = 0 ; j < 24 ; j++ ) { //number of NS layers!

var templayer = "a"+j;

for (ai = 0; ai < Clrs.length; ai++) {

var c = Math.round(Math.random()*[ai]);

}

if (currStep < 90)

document.layers[templayer].bgColor=initialStarColor;

if (currStep > 90)

document.layers[templayer].bgColor=Clrs[c];

document.layers[templayer].top = Mtop + yBase*Math.sin((currStep+j*5)/3)*Math.sin(550+currStep/100)

document.layers[templayer].left = Mleft + yBase*Math.cos((currStep+j*5)/3)*Math.sin(550+currStep/100)

}

}

currStep+= step;

T=setTimeout("Fireworks()",5);

if (currStep == 220) {

currStep = -10;

for (n = 0; n < sClrs.length; n++) {

var k = Math.round(Math.random()*n);

}

initialStarColor = sClrs[k];

if (document.all) {

Dtop = window.document.body.clientHeight - 250;

Dleft = xBase * 3.5;

Mtop = Math.round(Math.random()*Dtop);

Mleft = Math.round(Math.random()*Dleft);

document.all.starsDiv.style.top = Mtop+document.body.scrollTop;

document.all.starsDiv.style.left = Mleft+document.body.scrollLeft;

}

else if (document.layers) {

Dleft = window.innerWidth - 100;

Dtop = window.innerHeight - 100;

Mtop = Math.round(Math.random()*Dtop+window.pageYOffset);

Mleft = Math.round(Math.random()*Dleft+window.pageXOffset);

document.layers[templayer].top = Mtop;

document.layers[templayer].left = Mleft;

}

if ((Mtop < 20) || (Mleft < 20)) {

Mtop += 90;

Mleft += 90;

}

}

}

Fireworks();

// End -->

</script>

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