飘落的枫叶
1.把<body>改为<body onload="fall()">
加入如下代码到body区域 <script language="JavaScript"> <!-- Image0=new Image(); Image0.src="21/a.gif"; Image1=new Image(); Image1.src="21/b.gif"; Image2=new Image(); Image2.src="21/c.gif"; Image3=new Image(); Image3.src="21/d.gif"; Image4=new Image(); Image4.src="21/e.gif"; Image5=new Image(); Image5.src="21/f.gif"; grphcs=new Array(6) grphcs[0]="21/a.gif" grphcs[1]="21/b.gif" grphcs[2]="21/c.gif" grphcs[3]="21/d.gif" grphcs[4]="21/e.gif" grphcs[5]="21/f.gif" Amount=10; //樹葉數量 Ypos=new Array(); Xpos=new Array(); Speed=new Array(); Step=new Array(); Cstep=new Array(); ns=(document.layers)?1:0; if (ns){ for (i = 0; i < Amount; i++){ var P=Math.floor(Math.random()*grphcs.length); rndPic=grphcs[P]; document.write("<LAYER NAME='sn"+i+"' LEFT=0 TOP=0><img src="+rndPic+"></LAYER>"); } } else{ document.write('<div style="position:absolute;top:0px;left:0px"><div style="position:relative">'); for (i = 0; i < Amount; i++){ var P=Math.floor(Math.random()*grphcs.length); rndPic=grphcs[P]; document.write('<img id="si" src="'+rndPic+'" style="position:absolute;top:0px;left:0px">'); } document.write('</div></div>'); } WinHeight=(document.layers)?window.innerHeight:window.document.body.clientHeight; WinWidth=(document.layers)?window.innerWidth:window.document.body.clientWidth; for (i=0; i < Amount; i++){ Ypos[i] = Math.round(Math.random()*WinHeight); Xpos[i] = Math.round(Math.random()*WinWidth); Speed[i]= Math.random()*5+3; Cstep[i]=0; Step[i]=Math.random()*0.1+0.05; } function fall(){ 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 < Amount; i++){ sy = Speed[i]*Math.sin(90*Math.PI/180); sx = Speed[i]*Math.cos(Cstep[i]); Ypos[i]+=sy; Xpos[i]+=sx; if (Ypos[i] > WinHeight){ Ypos[i]=-60; Xpos[i]=Math.round(Math.random()*WinWidth); Speed[i]=Math.random()*5+3; } if (ns){ document.layers['sn'+i].left=Xpos[i]; document.layers['sn'+i].top=Ypos[i]+hscrll; } else{ si[i].style.pixelLeft=Xpos[i]; si[i].style.pixelTop=Ypos[i]+hscrll; } Cstep[i]+=Step[i]; } setTimeout('fall()',10); } //--> </script>
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