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js实现小鱼吐泡泡在页面游动特效_页面背景

来源：测品娱乐

<html>

<head>

<title>js小鱼吐泡泡在页面游动</title>

</head>

= Pics.length) Pos=0;

if (Ns) document.nfish.document.images.nframe.src=Pics[Pos];

else document.images.iframe.src=Pics[Pos];

Timer=setTimeout('AniFish()',50)

}

function MoveFish(){

H=(document.layers)?window.innerHeight+window.pageYOffset:window.document.body.clientHeight+document.body.scrollTop;

W=(document.layers)?window.innerWidth+window.pageXOffset:window.document.body.clientWidth+document.body.scrollLeft;

Strt-=2;

if (Strt < 0-(Load[0].width)) Strt=W;

if (Ns){document.nfish.left=Strt;document.nfish.top=H-(Load[0].height+10)}

else {ifish.style.left=Strt;ifish.style.top=H-(Load[0].height+10)}

setTimeout('MoveFish()',10)

}

H2=(document.layers)?window.innerHeight:window.document.body.clientHeight;

for (i=0; i < Amount; i++){

Ypos[i]=Math.random()*H2-50;

Xpos[i]=-50;

Speed[i]=Math.random()*10+1;

Cstep[i]=0;

Step[i]=Math.random()*0.1+0.05;

Grow[i]=4;

NsSize[i]=Math.random()*4+6;

Rate[i]=Math.random()*0.5+0.1;

}

if (Ns){

for (i = 0; i < Amount; i++){

document.write("<layer name='sn"+i+"' left=0 top=-50></layer>");

}

document.write("<layer name='nfish' left=0 top=-50></layer>");

}

else{

document.write('');

for (i = 0; i < Amount; i++){

document.write('');

}

document.write('');

document.write(''

+'');

}

function Bubbles(){

Hs=(document.layers)?window.pageYOffset:document.body.scrollTop;

Ws=(document.layers)?window.pageXOffset:document.body.scrollLeft;

for (i=0; i < Amount; i++){

sy = Speed[i]*Math.sin(270*Math.PI/180);

sx = Speed[i]*Math.cos(Cstep[i]*5);

Ypos[i]+=sy;

Xpos[i]+=sx;

if (Ypos[i] < -40){

if (Ns) {Ypos[i]=document.nfish.top;Xpos[i]=document.nfish.left}

else {Ypos[i]=ifish.style.pixelTop;Xpos[i]=ifish.style.pixelLeft}

Speed[i]= 6+Math.random()*3;

Grow[i]=4;

NsSize[i]=Math.random()*4+6;

}

if (Ns){

document.layers['sn'+i].left=Xpos[i]+Ws;

document.layers['sn'+i].top=Ypos[i]+Hs;

}

else{

si[i].style.pixelLeft=Xpos[i]+Ws;

si[i].style.pixelTop=Ypos[i]+Hs;

si[i].style.width=Grow[i];

si[i].style.height=Grow[i];

}

Grow[i]+=Rate[i];

Cstep[i]+=Step[i];

if (Grow[i] > 15) Grow[i]=16;

}

setTimeout('Bubbles()',10);

}

function Start(){

AniFish();

MoveFish();

Bubbles();

}

//-->

</ script>

</body>

</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]