把如下代码复制到<body></body>之间<script language="JavaScript"> <!-- Amount=20; //Smoothness! depends on image file size, the smaller the size the more you can use! //Pre-load your image below! Image0=new Image(); Image0.src="photo/flake1.gif"; Image1=new Image(); Image1.src="photo/flake2.gif"; Image2=new Image(); Image2.src="photo/flake3.gif"; Image3=new Image(); Image3.src="photo/flake4.gif"; Image4=new Image(); Image4.src="photo/flake5.gif"; grphcs=new Array(5) grphcs[0]="photo/flake1.gif" grphcs[1]="photo/flake2.gif" grphcs[2]="photo/flake3.gif" grphcs[3]="photo/flake4.gif" grphcs[4]="photo/flake5.gif" 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()*3+2; 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+2; } 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>
修改<body>标签为<body onLoad="fall()">
使用说明:代码中的image1至image4、grphcs[0]至grphcs[4]为雪景所使用的图片,下载图片后解压到网页的同一目录即可,也可以使用你喜欢的图片作为背景。
代码图片pic.rar