代码如下：
<script language="JavaScript1.2"> <!-- Begin ImgA=new Image(); ImgA.src="bat1.gif"; ImgB=new Image(); ImgB.src="bat2.gif"; ImgC=new Image(); ImgC.src="bat3.gif"; ImgD=new Image(); ImgD.src="bat4.gif"; // End --> </script> <script language="JavaScript1.2"> <!-- Begin amount=6; Xpos=300; Ypos=200; step=0.5; dismissafter=100; bats=new Array(ImgA.src,ImgB.src,ImgC.src,ImgD.src) if (document.layers){ for (i=0; i < amount; i++) {document.write("<LAYER NAME=n"+i+" LEFT=0 TOP=-50><IMG SRC='bat1.gif' NAME='nsi'></LAYER>")} } if (document.all) { document.write('<div id="out" style="position:absolute;top:0;left:0"><div id="in" style="position:relative">'); for (i=0; i < amount; i++) {document.write('<img src="bat1.gif" id="msieBats"'+i+' style="position:absolute;top:-50;left:0">')} document.write('</div></div>'); } yBase=0; xBase=0; currStep=0; a_count=0; b_count=1; c_count=2; d_count=3; move=1; if (document.layers){ yBase=window.innerHeight/3; xBase=window.innerWidth/6; window.captureEvents(Event.MOUSEMOVE); } if (document.all){ yBase = window.document.body.offsetHeight/3; xBase = window.document.body.offsetWidth/6; } function dismissbat(){ clearInterval(flybat) if (document.layers){ for (i2=0; i2 < amount; i2++){ document.layers['n'+i2].visibility="hide" } } else if (document.all) document.all.out.style.visibility="hidden" } function Animate(){ a_count+=move; b_count+=move; c_count+=move; d_count+=move; currStep+=step; if (a_count >= bats.length) a_count=0; if (b_count >= bats.length) b_count=0; if (c_count >= bats.length) c_count=0; if (d_count >= bats.length) d_count=0; if (document.layers){ document.layers['n'+0].document.images['nsi'].src=bats[a_count]; document.layers['n'+1].document.images['nsi'].src=bats[b_count]; document.layers['n'+2].document.images['nsi'].src=bats[b_count]; if (amount > 2) { for (i=3; i < amount; i++) {document.layers['n'+i].document.images['nsi'].src=bats[d_count]} } for (i=0; i < amount; i++) { var NewL="n"+i document.layers[NewL].top = Ypos+yBase*Math.sin(((currStep)+i*3.7)/4)*Math.cos((currStep+i*35)/10) document.layers[NewL].left =Xpos+xBase*Math.cos(((currStep)+i*3.7)/4)*Math.cos((currStep+i*35)/62) } } if (document.all){ document.all.msieBats[0].src=bats[a_count]; document.all.msieBats[1].src=bats[b_count]; document.all.msieBats[2].src=bats[c_count]; if (amount > 2) { for (i=3; i < amount; i++) {document.all.msieBats[i].src=bats[d_count]} } for (i=0; i < amount; i++) { document.all.msieBats[i].style.pixelTop = Ypos+yBase*Math.sin(((currStep)+i*3.7)/4)*Math.cos((currStep+i*35)/10) document.all.msieBats[i].style.pixelLeft =Xpos+xBase*Math.cos(((currStep)+i*3.7)/4)*Math.cos((currStep+i*35)/62) <!-- “猎趣网上精华”--最好的网页特效站www.liequ.net/texiao/，制作特效您只需轻点几下鼠标即可完成！ --> } } } flybat=setInterval('Animate()',30); setTimeout("dismissbat()",dismissafter*1000) // End --> </script>