Bubble bath javascript

Bubble bath javascript, this javascript produces bubbles bubbling up the screen like a bath and is a free DHTML effect can use on your own website.
script:

<script type="text/javascript">
// <![CDATA[
var colours=new Array("#8258fa", "#da81f5", "#f3f781", "#bef781", "#81f7f3"); // colours for top, right, bottom and left borders and background of bubbles
var bubbles=66; // how many bubbles are moving at any given time
var over_or_under="over"; // set to "over" for bubbles to always be on top, or "under" to allow them to float behind other objects
var swide=800;
var shigh=600;
var bubb=new Array();
var bubbx=new Array();
var bubby=new Array();
var bubbs=new Array();
var boddie;
var ie_version=(navigator.appVersion.indexOf("MSIE")!=-1)?parseFloat(navigator.appVersion.split("MSIE")[1]):false;

function addLoadEvent(funky) {
  var oldonload=window.onload;
  if (typeof(oldonload)!='function') window.onload=funky;
  else window.onload=function() {
    if (oldonload) oldonload();
    funky();
  }
}

addLoadEvent(bubba);

function bubba() { if (document.getElementById) {
  var i, rats, div;
  boddie=document.createElement("div");
  boddie.style.position="fixed";
  boddie.style.top="0px";
  boddie.style.left="0px";
  boddie.style.overflow="visible";
  boddie.style.width="1px";
  boddie.style.height="1px";
  boddie.style.backgroundColor="transparent";
  boddie.style.zIndex="0";
  document.body.appendChild(boddie);
  set_width();
  for (i=0; i<bubbles; i++) {
    rats=createDiv("3px", "3px");

 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];
    if (ie_version && ie_version<10) div.filter="alpha(opacity=50)";
    else div.opacity=0.5;

    boddie.appendChild(rats);
 bubb[i]=rats.style;
 bubb[i].zIndex=(over_or_under=="over")?"1001":"0";
  }
  bubble();
}}

function bubble() {
  var c;
  for (c=0; c<bubbles; c++) if (!bubby[c] && Math.random()<0.333) {
    bubb[c].left=(bubbx[c]=Math.floor(swide/6+Math.random()*swide/1.5)-10)+"px";
    bubb[c].top=(bubby[c]=shigh)+"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]>0 && bubbx[i]>0 && bubbx[i]<swide) {
   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;
    }
  }
}

window.onresize=set_width;
function set_width() {
  var sw_min=999999;
  var sh_min=999999;
  if (document.documentElement && document.documentElement.clientWidth) {
    if (document.documentElement.clientWidth>0) sw_min=document.documentElement.clientWidth;
    if (document.documentElement.clientHeight>0) sh_min=document.documentElement.clientHeight;
  }
  if (typeof(self.innerWidth)=='number' && self.innerWidth) {
    if (self.innerWidth>0 && self.innerWidth<sw_min) sw_min=self.innerWidth;
    if (self.innerHeight>0 && self.innerHeight<sh_min) sh_min=self.innerHeight;
  }
  if (document.body.clientWidth) {
    if (document.body.clientWidth>0 && document.body.clientWidth<sw_min) sw_min=document.body.clientWidth;
    if (document.body.clientHeight>0 && document.body.clientHeight<sh_min) sh_min=document.body.clientHeight;
  }
  if (sw_min==999999 || sh_min==999999) {
    sw_min=800;
    sh_min=600;
  }
  swide=sw_min;
  shigh=sh_min;
}

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";
  div.style.backgroundColor="transparent";
  return (div);
}
// ]]>
</script>

Enjoy!