星空背景

語法說明：

在 ("abbbff","ffffee","ffff7a","dffffd","ffaaa0","ffddd0") 中修改星星的顏色
在 S_amount = 30; 中修改星星的數量
在 L_amount = 10; 中修改星星的大小

<script language="JavaScript"> 

cOlOuRs=new Array("abbbff","ffffee","ffff7a","dffffd","ffaaa0","ffddd0") 

L_amount = 10;
S_Ypos = new Array(); 
S_Xpos = new Array(); 
L_Ypos = new Array(); 
L_Xpos = new Array(); 
S_speed= new Array(); 
L_speed= new Array(); 
if (document.all) 
{ 
for (i = 0; i < S_amount; i++)  
{                                                                 
 S_Ypos[i] = Math.round(Math.random()*document.body.offsetHeight); 
 S_Xpos[i] = Math.round(Math.random()*document.body.offsetWidth); 
} 
for (i = 0; i < L_amount; i++)  
{                                                                 
 L_Ypos[i] = Math.round(Math.random()*document.body.offsetHeight); 
 L_Xpos[i] = Math.round(Math.random()*document.body.offsetWidth); 
} 
document.write('<div id="Outer" style="position:absolute;top:0px;left:0px">'); 
document.write('<div id="Inner" style="position:relative">'); 
for (i = 0; i < S_amount; i++) 
{document.write('<div id="ieS_star" style="position:absolute;top:'+S_Ypos[i]+';left:'+S_Xpos[i]+';width:1px;height:1px;background:#fffff0;font-size:1px"></div>');} 
for (i = 0; i < L_amount; i++)  
{document.write('<div id="ieL_star" style="position:absolute;top:'+L_Ypos[i]+';left:'+L_Xpos[i]+';width:2px;height:2px;background:#ffffff;font-size:2px"></div>');} 
document.write('</div>'); 
document.write('</div>'); 
for (i = 0; i < L_amount; i++)  
{ 
 for (j = 0; j < cOlOuRs.length; j++) 
  {var NewColour=Math.round(Math.random()*[j])} 
document.all.ieS_star[i].style.background=cOlOuRs[NewColour]; 
document.all.ieL_star[i].style.background=cOlOuRs[NewColour]; 
} 
for (i=0; i < ieS_star.length; i++){S_speed[i]=Math.random()*3+1} 
for (i=0; i < ieL_star.length; i++){L_speed[i]=Math.random()*7+2} 
function ES_go() 
{ 
 document.all.Outer.style.pixelTop=document.body.scrollTop; 
 for (i=0; i < ieS_star.length; i++) 
 { 
 ieS_star[i].style.pixelLeft-=S_speed[i]; 
 if (ieS_star[i].style.pixelLeft < -10){ieS_star[i].style.pixelLeft=window.document.body.offsetWidth} 
 } 
S_timer=setTimeout('ES_go()',30); 
} 
function EL_go() 
{ 
 for (i=0; i < ieL_star.length; i++) 
 { 
 ieL_star[i].style.pixelLeft-=L_speed[i]; 
 if (ieL_star[i].style.pixelLeft < -10){ieL_star[i].style.pixelLeft=window.document.body.offsetWidth} 
 } 
L_timer=setTimeout('EL_go()',10); 
} 
function IeStart() 
{ 
 ES_go(); 
 EL_go(); 
} 
IeStart() 
}
else if (document.layers) 
{ 
for (i = 0; i < S_amount; i++)  
{                                                                 
 S_Ypos[i] = Math.round(Math.random()*window.innerHeight); 
 S_Xpos[i] = Math.round(Math.random()*window.innerWidth); 
 document.write("<LAYER NAME='S_star"+i+"' LEFT=0 TOP=0 BGCOLOR='#FFFFF0' CLIP='0,0,1,1'></LAYER>"); 
 document.layers["S_star"+i].top = S_Ypos[i]; 
 document.layers["S_star"+i].left = S_Xpos[i]; 
} 
for (i = 0; i < L_amount; i++)  
{ 
 L_Ypos[i] = Math.round(Math.random()*window.innerHeight); 
 L_Xpos[i] = Math.round(Math.random()*window.innerWidth); 
 document.write("<LAYER NAME='L_star"+i+"' LEFT=0 TOP=0 BGCOLOR='#FFFFF0' CLIP='0,0,2,2'></LAYER>"); 
 document.layers["L_star"+i].top = L_Ypos[i]; 
 document.layers["L_star"+i].left = L_Xpos[i]; 
  for (j = 0; j < cOlOuRs.length; j++) 
   { 
   var NewColour=Math.round(Math.random()*[j]); 
   } 
document.layers['S_star'+i].bgColor=cOlOuRs[NewColour]; 
document.layers['L_star'+i].bgColor=cOlOuRs[NewColour]; 
} 
for (i=0; i < S_amount; i++){S_speed[i]=Math.random()*3+1} 
for (i=0; i < L_amount; i++){L_speed[i]=Math.random()*7+2}  
function NS_go() 
{ 
 for (i=0; i < S_amount; i++) 
 { 
 var temp="S_star"+i;//50 
 document.layers[temp].top=S_Ypos[i]+window.pageYOffset; 
 document.layers['S_star'+i].left-=S_speed[i]; 
 if (document.layers['S_star'+i].left < -10){document.layers['S_star'+i].left=window.innerWidth} 
 } 
S_timer=setTimeout('NS_go()',30); 
} 
function NL_go() 
{ 
 for (i=0; i < L_amount; i++) 
 { 
 var temp="L_star"+i 
 document.layers[temp].top=L_Ypos[i]+window.pageYOffset; 
 document.layers['L_star'+i].left-=L_speed[i]; 
 if (document.layers['L_star'+i].left < -10){document.layers['L_star'+i].left=window.innerWidth} 
} 
L_timer=setTimeout('NL_go()',10); 
} 
function NsStart() 
{ 
 NS_go(); 
 NL_go(); 
} 
NsStart(); 
}
window.onresize = new Function("window.location.reload()"); 
--> 
</script>
<div style="position:relative"></div>