一个JavaScript旋转变色圆环特效

2024-09-05 12:21:48

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一个JavaScript旋转变色圆环特效，没有停顿，很流畅的效果，可以作为网页背景。

<html><head><title>变色旋转圆环</title><meta http-equiv="Content-Type" content="text/html; charset=gb2312"> </head> <body  bgcolor=#FFFFFF  ><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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