跟隨鼠標(biāo)的星星JS代碼

2012/10/23 18:22:24作者：佚名來(lái)源：網(wǎng)絡(luò)

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【實(shí)例名稱】

跟隨鼠標(biāo)的星星

【實(shí)例描述】

為了增加鼠標(biāo)的顯示效果，本例在鼠標(biāo)周圍布置一彩色的星星，這星星會(huì)跟隨鼠標(biāo)移動(dòng)，而且實(shí)現(xiàn)閃爍效果。

【實(shí)例代碼】

 <html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>標(biāo)題頁(yè)</title>
</head>
<body>
看看鼠標(biāo)周圍的效果，是不是五顏六色的星星。
<script language="javascript">
function Div_Layer(divleft,divtop,divfnx,
divfny,mydiv,divbilder,divloop,divto,divcnt,divstep) 
{ 
 if ((document.layers)||(document.all)){
  with (Math) {yynextx= eval(divfnx)}                      
//設(shè)置為數(shù)值型數(shù)據(jù)
  with (Math) {yynexty= eval(divfny)}
  divcnt=(divloop && divcnt>=divstep*divbilder)?0:divcnt+divstep;
  if (document.layers){
    eval(mydiv+".top="+(yynexty+divtop))                 
//netscape下設(shè)置橫坐標(biāo)和縱坐標(biāo)
    eval(mydiv+".left="+(yynextx+divleft))
  }
  if (document.all){
    eval("mydiv=mydiv.replace(/.layers/gi, '.all')");
    eval(mydiv+".style.pixelTop="+(yynexty+divtop));     
//設(shè)置div的橫坐標(biāo)
    eval(mydiv+".style.pixelLeft="+(yynextx+divleft));   
//設(shè)置div的縱坐標(biāo)
  }
  argStr='Div_Layer('+divleft+','+divtop+',"'+divfnx+'","'
+divfny+'","'+mydiv+'",'+divbilder+','+divloop+','+divto+
','+divcnt+','+divstep+')';
  if (divcnt<=divstep*divbilder){
  eval(mydiv+".divto=setTimeout(argStr,divto)");           
//設(shè)置定時(shí)器-實(shí)現(xiàn)星星的閃爍效果
  }
 }
}
function YY_Mousetrace(evnt)                             
//設(shè)置鼠標(biāo)移動(dòng)的事件
{ 
 if (yyns4)                                              
//Netscape瀏覽器的情況
  {if (evnt.pageX) {yy_ml=evnt.pageX;  yy_mt=evnt.pageY;}  }
 else{
   yy_ml=(event.clientX + document.body.scrollLeft);     
//橫坐標(biāo)位置
   yy_mt=(event.clientY + document.body.scrollTop);      
//縱坐標(biāo)位置
 }
 if (yy_tracescript)eval(yy_tracescript)                 
//轉(zhuǎn)換為數(shù)值型變量
}
</script>
<div id="tooltip2"
   style="position:absolute;visibility:hidden;clip:rect(0 150 50 0);
width:150px;background-color:lightyellow"> 
  <layer name="nstip" width="1000px" bgcolor="lightyellow"> </layer>
</div>
      <div id="yyd0"
style="position:absolute; left:10px; top:50px; width:3px; height:3px; 
z-index:1; background-color: #19636c; layer-background-color: #19636c; 
border: 1px none #000000; clip: rect(0 3 3 0)"></div>
      <div
id="yyd1"
style="position:absolute; left:20px; top:50px; width:3px; height:3px; 
z-index:1; background-color: #708574; layer-background-color: #708574; 
border: 1px none #000000; clip: rect(0 3 3 0)"></div>
      <div
id="yyd2"
style="position:absolute; left:30px; top:50px; width:3px; height:3px; 
z-index:1; background-color: #379bbf; layer-background-color: #379bbf; 
border: 1px none #000000; clip: rect(0 3 3 0)"></div>
      <div
id="yyd3"
style="position:absolute; left:40px; top:50px; width:3px; height:3px; 
z-index:1; background-color: #25184c; layer-background-color: #25184c; 
border: 1px none #000000; clip: rect(0 3 3 0)"></div>
      <div
id="yyd4"
style="position:absolute; left:50px; top:50px; width:3px; height:3px; 
z-index:1; background-color: #31bd3c; layer-background-color: #31bd3c; 
border: 1px none #000000; clip: rect(0 3 3 0)"></div>
      <div
id="yyd5"
style="position:absolute; left:60px; top:50px; width:3px; height:3px; 
z-index:1; background-color: #c11efd; layer-background-color: #c11efd; 
border: 1px none #000000; clip: rect(0 3 3 0)"></div>
<script language="javascript">
    var yyns4=window.Event?true:false; var yy_mt = 0; var yy_ml = 0;
//點(diǎn)的坐標(biāo)
    document.onmousemove = YY_Mousetrace;                           
//綁定鼠標(biāo)移動(dòng)的事件
    yy_tracescript = '';
    Div_Layer(0,0,'yy_ml+cos((15*sin(divcnt/39.83007847812662))+0)
*150*(sin(10+divcnt/20)+0.2)*cos(divcnt/20)','yy_mt+sin((15*sin
(divcnt/34.224861639800686))+0)*150*(sin(10+divcnt/20)+0.2)*cos
(divcnt/20)','document.layers[\'yyd0\']',2000,true,80,0,1);
    Div_Layer(0,0,'yy_ml+cos((15*sin(divcnt/27.66510707209673))+30)
*150*(sin(10+divcnt/20)+0.2)*cos(divcnt/20)','yy_mt+sin((15*sin
(divcnt/9.240632767417667))+30)*150*(sin(10+divcnt/20)+0.2)*cos
(divcnt/20)','document.layers[\'yyd1\']',2000,true,80,0,1);
    Div_Layer(0,0,'yy_ml+cos((15*sin(divcnt/16.45318944579641))+60)
*150*(sin(10+divcnt/20)+0.2)*cos(divcnt/20)','yy_mt+sin((15*sin
(divcnt/16.0564452288292))+60)*150*(sin(10+divcnt/20)+0.2)*cos
(divcnt/20)','document.layers[\'yyd2\']',2000,true,80,0,1);
    Div_Layer(0,0,'yy_ml+cos((15*sin(divcnt/6.95348954836835))
+90)*150*(sin(10+divcnt/20)+0.2)*cos(divcnt/20)','yy_mt+sin(
(15*sin(divcnt/44.13697049887155))+90)*150*(sin(10+divcnt/20)
+0.2)*cos(divcnt/20)','document.layers[\'yyd3\']',2000,true,80,0,1);
    Div_Layer(0,0,'yy_ml+cos((15*sin(divcnt/33.90077294583733))
+120)*150*(sin(10+divcnt/20)+0.2)*cos(divcnt/20)','yy_mt+sin(
(15*sin(divcnt/2.2378828869411587))+120)*150*(sin(10+divcnt/20)
+0.2)*cos(divcnt/20)','document.layers[\'yyd4\']',2000,true,80,0,1);
    Div_Layer(0,0,'yy_ml+cos((15*sin(divcnt/37.858312521039835))
+150)*150*(sin(10+divcnt/20)+0.2)*cos(divcnt/20)','yy_mt+sin(
(15*sin(divcnt/18.083839795990098))+150)*150*(sin(10+divcnt/20)
+0.2)*cos(divcnt/20)','document.layers[\'yyd5\']',2000,true,80,0,1);
    </script>
</body>
</html>

【運(yùn)行效果】

運(yùn)行效果

【難點(diǎn)剖析】

本例重點(diǎn)是這星星的布局，顏色和跳動(dòng)。星星通過(guò)div實(shí)現(xiàn)，顏色通過(guò)設(shè)置div的樣式“background-color”實(shí)現(xiàn)，有多少顆星星，就有多少個(gè)div。為了實(shí)現(xiàn)星星五顏六色效果，每個(gè)div的顏色都不相同。最后通過(guò)一個(gè)“setTimeOut”定時(shí)器，實(shí)現(xiàn)星星的跳動(dòng)效果。

【源碼下載】

本實(shí)例JS代碼下載

標(biāo)簽：鼠標(biāo) JS代碼