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变色的旋转圆圈JS特效代码

2017-01-20 17:20 357 查看

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>变色的旋转圆圈</title>

</head>

<body>

<script language="JavaScript">

var CoLoUrS=new Array('ff0000','ffffff','0000ff','ffffff');

var dots=16;

var ThingsInArray;

var step=0.3;

var a_StEp=0.05;

var RunTime=0;

var currStep = 0;

var Xpos = 0;

var Ypos = 0;

var cntr=70;

var count_a=0;

var move_a=1;

var curColour;

var count=0;

var move=1;

var brwsr=(document.layers)?1:0;

if (brwsr){

for (i=0; i < dots; i++){

document.write('<LAYER NAME="a'+i+'" LEFT=0 TOP=0 BGCOLOR=#ffffff CLIP="0,0,2,2"></LAYER>');

}

var x = document;

ThingsInArray=new Array(x.a0,x.a1,x.a2,x.a3,x.a4,x.a5,x.a6,x.a7,x.a8,x.a9,x.a10,x.a11,x.a12,x.a13,x.a14,x.a15)

}

else{

document.write('<div id="ieDiv" style="position:absolute;top:0px;left:0px"><div id="c" style="position:relative">');

for (i=0; i < dots; i++){

document.write('<div style="position:absolute;top:0px;left:0px;width:2px;height:2px;background:#ffffff;font-size:2px"></div>');

}

document.write('</div></div>');

var x = ieDiv.all.c.all;

ThingsInArray=new Array(x[0],x[1],x[2],x[3],x[4],x[5],x[6],x[7],x[8],x[9],x[10],x[11],x[12],x[13],x[14],x[15])

}

function colourStep(){

count+=move;

if (count >= ThingsInArray.length) {count=0;count_a+=move}

if (count_a == CoLoUrS.length) count_a=0;

if (brwsr) ThingsInArray[count].bgColor=CoLoUrS[count_a];

else ThingsInArray[count].style.background=CoLoUrS[count_a];

setTimeout('colourStep()',100)

}

function moveAbout(){

if (brwsr){

Ypos = window.pageYOffset+window.innerHeight/2 + window.innerHeight/3.1 * Math.cos((RunTime)/3)*Math.cos(RunTime/50);

Xpos = window.pageXOffset+window.innerWidth/2 + window.innerWidth/2.4 * Math.sin((RunTime)/5)*Math.cos(RunTime/30);

}

else{

Ypos = document.body.scrollTop+document.body.offsetHeight/2 + document.body.offsetHeight/2.8*Math.cos((RunTime)/3)*Math.cos(RunTime/10);

Xpos= document.body.scrollLeft+document.body.offsetWidth/2 + document.body.offsetWidth/2.4*Math.sin((RunTime)/5)*Math.sin(RunTime/20);

}

RunTime+=a_StEp;

Tma=setTimeout("moveAbout()", 10);

}

function TwistnSpin(){

if (brwsr){

for ( i = 0 ; i < 16 ; i++ )

{

var templayer="a"+i

document.layers[templayer].top = Ypos+cntr*Math.cos((currStep + i*4)/10.2)*Math.cos(currStep/10)

document.layers[templayer].left =Xpos+cntr*Math.sin((currStep + i*4)/10.2);

}

}

else{

for (i=0;i<ieDiv.all.c.all.length;i++)

{

ieDiv.all.c.all[i].style.top = Ypos+cntr*Math.cos((currStep + i*4)/10.2)*Math.cos(currStep/10)

ieDiv.all.c.all[i].style.left= Xpos+cntr*Math.sin((currStep + i*4)/10.2);

}

}

currStep+=step;

setTimeout("TwistnSpin()",10);

}

function Shrink(){

cntr-=0.5;

GoShrink=setTimeout('Shrink()',10);

if (cntr <=20)

{clearTimeout(GoShrink);Swell()}

}

function Swell(){

cntr+=0.5;

GoSwell=setTimeout('Swell()',10);

if (cntr >=70)

{clearTimeout(GoSwell);Shrink()}

}

function StArTuP(){

moveAbout();

TwistnSpin();

Shrink();

colourStep();

}

StArTuP();

</script>

</body>

</html>

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