145又一雪景效果

145又一雪景效果

脚本说明:

第一步:把如下代码加入<body>区域中

<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="flake1.gif";

Image1=new Image();

Image1.src="flake2.gif";

Image2=new Image();

Image2.src="flake3.gif";

Image3=new Image();

Image3.src="flake4.gif";

Image4=new Image();

Image4.src="flake5.gif";

 

grphcs=new Array(5)

grphcs[0]="flake1.gif"

grphcs[1]="flake2.gif"

grphcs[2]="flake3.gif"

grphcs[3]="flake4.gif"

grphcs[4]="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>

 

 

第二步:把<body>中的内容改为

<body bgcolor="#fef4d9" onLoad="fall()">

 

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