Bueno, no tenía mariposas, así que usé otros bichos. Fijate si te sirve esto:
http://www.disegnocentell.com.ar/new.../mariposas.php
Este es el código:
Código PHP:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title></title>
</head>
<body>
<div id="contenedor0" style="position:absolute; top:1px; left:1px;"><img src="1843.png" width="32" height="32" /></div>
<div id="contenedor1" style="position:absolute; top:1px; left:1px;"><img src="1843.png" width="32" height="32" /></div>
<div id="contenedor2" style="position:absolute; top:1px; left:1px;"><img src="1843.png" width="32" height="32" /></div>
<div id="contenedor3" style="position:absolute; top:1px; left:1px;"><img src="1843.png" width="32" height="32" /></div>
<div id="contenedor4" style="position:absolute; top:1px; left:1px;"><img src="1843.png" width="32" height="32" /></div>
<div id="contenedor5" style="position:absolute; top:1px; left:1px;"><img src="1843.png" width="32" height="32" /></div>
<script>
function getWindowData(){
var widthViewport,heightViewport,xScroll,yScroll,widthTotal,heightTotal;
if (typeof window.innerWidth != 'undefined'){
widthViewport= window.innerWidth-17;
heightViewport= window.innerHeight-17;
}else if(typeof document.documentElement != 'undefined' && typeof document.documentElement.clientWidth !='undefined' && document.documentElement.clientWidth != 0){
widthViewport=document.documentElement.clientWidth;
heightViewport=document.documentElement.clientHeight;
}else{
widthViewport= document.getElementsByTagName('body')[0].clientWidth;
heightViewport=document.getElementsByTagName('body')[0].clientHeight;
}
xScroll=self.pageXOffset || (document.documentElement.scrollLeft+document.body.scrollLeft);
yScroll=self.pageYOffset || (document.documentElement.scrollTop+document.body.scrollTop);
widthTotal=Math.max(document.documentElement.scrollWidth,document.body.scrollWidth,widthViewport);
heightTotal=Math.max(document.documentElement.scrollHeight,document.body.scrollHeight,heightViewport);
return [widthViewport,heightViewport,xScroll,yScroll,widthTotal,heightTotal];
}
var c = 0.75;
var k = 0.06;
setTimeout(function(){mover.call(document.getElementById('contenedor0'));},15);
setTimeout(function(){mover.call(document.getElementById('contenedor1'));},15);
setTimeout(function(){mover.call(document.getElementById('contenedor2'));},15);
setTimeout(function(){mover.call(document.getElementById('contenedor3'));},15);
setTimeout(function(){mover.call(document.getElementById('contenedor4'));},15);
setTimeout(function(){mover.call(document.getElementById('contenedor5'));},15);
function mover() {
this.velocidadx=this.velocidadx || 0;
this.aceleracionx=this.aceleracionx || 0;
this.velocidady=this.velocidady || 0;
this.aceleraciony=this.aceleraciony || 0;
this.xo=this.xo || Math.random()*(getWindowData()[0]-this.getElementsByTagName('img')[0].width-10);
this.yo=this.yo || Math.random()*(getWindowData()[1]-this.getElementsByTagName('img')[0].height-10);
this._x=this._x || parseInt(this.style.left);
this._y= this._y || parseInt(this.style.top);
this.aceleracionx = this.velocidadx-k*(this._x-this.xo);
this.velocidadx = c*this.aceleracionx;
this._x += this.velocidadx;
this.style.left=this._x+'px';
this.aceleraciony = this.velocidady-k*(this._y-this.yo);
this.velocidady = c*this.aceleraciony;
this._y += this.velocidady;
this.style.top=this._y+'px';
var _this=this;
if (Math.abs(this._x-this.xo)<1 && Math.abs(this._y-this.yo)<1) {
this.xo = Math.random()*(getWindowData()[0]-_this.getElementsByTagName('img')[0].width-50);
this.yo = Math.random()*(getWindowData()[1]-_this.getElementsByTagName('img')[0].height-50);
}
setTimeout(function(){mover.call(_this);},15);
}
</script>
</body>
</html>