heart clicksplosion

<script type="text/javascript">
// <![CDATA[
var sparks = 12;
// how many sparks per clicksplosion
var speed = 33;
// how fast - smaller is faster
var bangs = 5;
// how many can be launched simultaneously (note that using too many can slow the script down)
var colours = new Array('#d6d6d6','#757575','#000000','#d6d6d6','#757575','#000000','#d6d6d6');
// blue red green purple cyan orange pink

/****************************
* Clicksplosion Effect *
*(c)2012-3 mf2fm web-design *
* http://www.mf2fm.com/rv *
* DON'T EDIT BELOW THIS BOX *
****************************/
var intensity = new Array();
var Xpos = new Array();
var Ypos = new Array();
var dX = new Array();
var dY = new Array();
var stars = new Array();
var decay = new Array();
var timers = new Array();
var swide = 800;
var shigh = 600;
var sleft = sdown = 0;
var count = 0;

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

addLoadEvent(clicksplode);

function clicksplode() {
if (document.getElementById) {
var i, j;
window.onscroll = set_scroll;
window.onresize = set_width;
document.onclick = eksplode;
set_width();
set_scroll();
for (i = 0; i < bangs; i++)
for (j = sparks * i; j < sparks + sparks * i; j++) {
stars[j] = createDiv('♡', 13);
document.body.appendChild(stars[j]);
}
}
}

function createDiv(char, size) {
var div, sty;
div = document.createElement('div');
sty = div.style;
sty.font = size + 'px monospace';
sty.position = 'absolute';
sty.backgroundColor = 'transparent';
sty.visibility = 'hidden';
sty.zIndex = '101';
div.appendChild(document.createTextNode(char));
return (div);
}

function bang(N) {
var i, Z, A = 0;
for (i = sparks * N; i < sparks * (N + 1); i++) {
if (decay[i]) {
Z = stars[i].style;
Xpos[i] += dX[i];
Ypos[i] += (dY[i] += 1.25 / intensity[N]);
if (Xpos[i] >= swide || Xpos[i] < 0 || Ypos[i] >= shigh + sdown || Ypos[i] < 0)
decay[i] = 1;
else {
Z.left = Xpos[i] + 'px';
Z.top = Ypos[i] + 'px';
}
if (decay[i] == 15)
Z.fontSize = '7px';
else if (decay[i] == 7)
Z.fontSize = '2px';
else if (decay[i] == 1)
Z.visibility = 'hidden';
decay[i]--;
} else
A++;
}
if (A != sparks)
timers[N] = setTimeout('bang(' + N + ')', speed);
}

function eksplode(e) {
var x, y, i, M, Z, N;
set_scroll();
y = (e) ? e.pageY : event.y + sdown;
x = (e) ? e.pageX : event.x + sleft;
N = ++count % bangs;
M = Math.floor(Math.random() * 3 * colours.length);
intensity[N] = 5 + Math.random() * 4;
for (i = N * sparks; i < (N + 1) * sparks; i++) {
Xpos[i] = x;
Ypos[i] = y - 5;
dY[i] = (Math.random() - 0.5) * intensity[N];
dX[i] = (Math.random() - 0.5) * (intensity[N] - Math.abs(dY[i])) * 1.25;
decay[i] = 16 + Math.floor(Math.random() * 16);
Z = stars[i].style;
if (M < colours.length)
Z.color = colours[i % 2 ? count % colours.length : M];
else if (M < 2 * colours.length)
Z.color = colours[count % colours.length];
else
Z.color = colours[i % colours.length];
Z.fontSize = '13px';
Z.visibility = 'visible';
}
clearTimeout(timers[N]);
bang(N);
}

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 - 7;
shigh = sh_min - 7;
}

function set_scroll() {
if (typeof (self.pageYOffset) == 'number') {
sdown = self.pageYOffset;
sleft = self.pageXOffset;
} else if (document.body && (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;
}
}
// ]]>
</script>