星空背景,仿佛遨游于星际中

- 中国WEB开发者网络 (http://www.webasp.net)
-- 网页特效 (http://www.webasp.net/javascript/)
--- 星空背景,仿佛遨游于星际中 (http://www.webasp.net/javascript/1/222.htm)
-- 发布日期： 2004-06-18
<!-- 网页特效代码由[中国WEB开发者网络:http://www.ChinaWebDev.com]提供！ -->
<!-- 要实现此效果需要 2 个步骤： -->

<!-- 第 1 步： -->
<!-- 把<BODY>中的属性代码改为： -->

<BODY bgcolor=#000000>



<!-- 第 2 步： -->
<!-- 把下面的代码加到<BODY></BODY>区域中： -->

<script language="JavaScript">
<!--
SmallStars = 30;
LargeStars = 10;

SmallYpos = new Array();
SmallXpos = new Array();
LargeYpos = new Array();
LargeXpos = new Array();
Smallspeed= new Array();
Largespeed= new Array();
ns=(document.layers)?1:0;
if (ns){
for (i = 0; i < SmallStars; i++)
{document.write("<LAYER NAME='sn"+i+"' LEFT=0 TOP=0 BGCOLOR='#FFFFF0' CLIP='0,0,1,1'></LAYER>")}
for (i = 0; i < LargeStars; i++)
{document.write("<LAYER NAME='ln"+i+"' LEFT=0 TOP=0 BGCOLOR='#FFFFFF' CLIP='0,0,2,2'></LAYER>")}
}
else{
document.write('<div style="position:absolute;top:0px;left:0px">');
document.write('<div style="position:relative">');
for (i = 0; i < SmallStars; i++)
{document.write('<div id="si" style="position:absolute;top:0;left:0;width:1px;height:1px;background:#fffff0;font-size:1px"></div>')}
document.write('</div>');
document.write('</div>');
document.write('<div style="position:absolute;top:0px;left:0px">');
document.write('<div style="position:relative">');
for (i = 0; i < LargeStars; i++)
{document.write('<div id="li" style="position:absolute;top:0;left:0;width:2px;height:2px;background:#ffffff;font-size:2px"></div>')}
document.write('</div>');
document.write('</div>');
}
WinHeight=(document.layers)?window.innerHeight:window.document.body.clientHeight;
WinWidth=(document.layers)?window.innerWidth:window.document.body.clientWidth;
//Inital placement!
for (i=0; i < SmallStars; i++)
{
SmallYpos[i] = Math.round(Math.random()*WinHeight);
SmallXpos[i] = Math.round(Math.random()*WinWidth);
Smallspeed[i]= Math.random()*5+1;
}
for (i=0; i < LargeStars; i++)
{
LargeYpos[i] = Math.round(Math.random()*WinHeight);
LargeXpos[i] = Math.round(Math.random()*WinWidth);
Largespeed[i]= Math.random()*10+5;
}
function fly(){
var WinHeight=(document.layers)?window.innerHeight:window.document.body.clientHeight;
var WinWidth=(document.layers)?window.innerWidth:window.document.body.clientWidth;
var hscrll=(document.layers)?window.pageYOffset:document.body.scrollTop;
var wscrll=(document.layers)?window.pageXOffset:document.body.scrollLeft;

for (i=0; i < LargeStars; i++)
{
LargeXpos[i]-=Largespeed[i];
if (LargeXpos[i] < -10)
{
LargeXpos[i]=WinWidth;
LargeYpos[i]=Math.round(Math.random()*WinHeight);
Largespeed[i]=Math.random()*10+5;
}
if (ns){
document.layers['ln'+i].left=LargeXpos[i];
document.layers['ln'+i].top=LargeYpos[i]+hscrll;
}
else{
li[i].style.pixelLeft=LargeXpos[i];
li[i].style.pixelTop=LargeYpos[i]+hscrll;
}
}

for (i=0; i < SmallStars; i++)
{
SmallXpos[i]-=Smallspeed[i];
if (SmallXpos[i] < -10)
{
SmallXpos[i]=WinWidth;
SmallYpos[i]=Math.round(Math.random()*WinHeight);
Smallspeed[i]=Math.random()*5+1;
}
if (ns){
document.layers['sn'+i].left=SmallXpos[i];
document.layers['sn'+i].top=SmallYpos[i]+hscrll;
}
else{
si[i].style.pixelLeft=SmallXpos[i];
si[i].style.pixelTop=SmallYpos[i]+hscrll;
}
}
setTimeout('fly()',10);
}
fly();
//-->
</script>

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