Autor: Alexandre | Publicado: 2012-11-15T12:12:00-08:00


// <![CDATA[
var colours=new Array("#a6f", "#60f", "#60f", "#a6f", "#ccc"); // colours for top, right, bottom and left borders and background of bubbles
var bubbles=66; // maximum number of bubbles on screen

var x=ox=400;
var y=oy=300;
var swide=800;
var shigh=600;
var sleft=sdown=0;
var bubb=new Array();
var bubbx=new Array();
var bubby=new Array();
var bubbs=new Array();

window.onload=function() { if (document.getElementById) {
  var rats, div;
  for (var i=0; i<bubbles; i++) {
    rats=createDiv("3px", "3px");
 rats.style.visibility="hidden";

 div=createDiv("auto", "auto");
    rats.appendChild(div);
 div=div.style;
    div.top="1px";
    div.left="0px";
 div.bottom="1px";
 div.right="0px";
 div.borderLeft="1px solid "+colours[3];
 div.borderRight="1px solid "+colours[1];

    div=createDiv("auto", "auto");
 rats.appendChild(div);
 div=div.style;
    div.top="0px";
    div.left="1px";
 div.right="1px";
 div.bottom="0px"
 div.borderTop="1px solid "+colours[0];
 div.borderBottom="1px solid "+colours[2];

 div=createDiv("auto", "auto");
 rats.appendChild(div);
 div=div.style;
 div.left="1px";
 div.right="1px";
    div.bottom="1px";
 div.top="1px";
 div.backgroundColor=colours[4];
 div.opacity=0.5;
 if (document.all) div.filter="alpha(opacity=50)";

    document.body.appendChild(rats);
 bubb[i]=rats.style;
  }
  set_scroll();
  set_width();
  bubble();
}}

function bubble() {
  var c;
  if (x!=ox || y!=oy) {
    ox=x;
    oy=y;
    for (c=0; c<bubbles; c++) if (!bubby[c]) {
      bubb[c].left=(bubbx[c]=x)+"px";
      bubb[c].top=(bubby[c]=y)+"px";
      bubb[c].width="3px";
  bubb[c].height="3px"
  bubb[c].visibility="visible";
  bubbs[c]=3;
      break;
 }
  }
  for (c=0; c<bubbles; c++) if (bubby[c]) update_bubb(c);
  setTimeout("bubble()", 40);
}

function update_bubb(i) {
  if (bubby[i]) {
    bubby[i]-=bubbs[i]/2+i%2;
    bubbx[i]+=(i%5-2)/5;
    if (bubby[i]>sdown && bubbx[i]>0) {
  if (Math.random()<bubbs[i]/shigh*2 && bubbs[i]++<8) {
  bubb[i].width=bubbs[i]+"px";
  bubb[i].height=bubbs[i]+"px";
  }
      bubb[i].top=bubby[i]+"px";
      bubb[i].left=bubbx[i]+"px";
    }
    else {
      bubb[i].visibility="hidden";
      bubby[i]=0;
      return;
    }
  }
}

document.onmousemove=mouse;
function mouse(e) {
  set_scroll();
  y=(e)?e.pageY:event.y+sleft;
  x=(e)?e.pageX:event.x+sdown; }

window.onresize=set_width;
function set_width() {
  if (document.documentElement && document.documentElement.clientWidth) {
    swide=document.documentElement.clientWidth;
    shigh=document.documentElement.clientHeight;
  }
  else if (typeof(self.innerHeight)=="number") {
    swide=self.innerWidth;
    shigh=self.innerHeight;
  }
  else if (document.body.clientWidth) {
    swide=document.body.clientWidth;
    shigh=document.body.clientHeight;
  }
  else {
    swide=800;
 shigh=600;
  }
}

window.onscroll=set_scroll;
function set_scroll() {
  if (typeof(self.pageYOffset)=="number") {
    sdown=self.pageYOffset;
    sleft=self.pageXOffset;
  }
  else if (document.body.scrollTop || document.body.scrollLeft) {
    sdown=document.body.scrollTop;
    sleft=document.body.scrollLeft;
  }
  else if (document.documentElement && (document.documentElement.scrollTop || document.documentElement.scrollLeft)) {
    sleft=document.documentElement.scrollLeft;
 sdown=document.documentElement.scrollTop;
  }
  else {
    sdown=0;
    sleft=0;
  }
}

function createDiv(height, width) {
  var div=document.createElement("div");
  div.style.position="absolute";
  div.style.height=height;
  div.style.width=width;
  div.style.overflow="hidden";
  return (div);
}
// ]]>