Produce un efecto de gotas de agua cayendo desde lo alto del monitor. No necesita ninguna imágen ya que utiliza el simbolo de la coma (,) para dibujar la lluvia.
Debes poner el Script dentro del <BODY> de tu página
<SCRIPT LANGUAGE="JavaScript">
var no = 50;
var speed = 1;
var ns4up = (document.layers) ? 1 : 0;
var ie4up = (document.all) ? 1 : 0;
var s, x, y, sn, cs;
var a, r, cx, cy;
var i, doc_width = 800, doc_height = 600;
if (ns4up) {
doc_width = self.innerWidth;
doc_height = self.innerHeight;
}
else
if (ie4up) {
doc_width = document.body.clientWidth;
doc_height = document.body.clientHeight;
}
x = new Array();
y = new Array();
r = new Array();
cx = new Array();
cy = new Array();
s = 8;
for (i = 0; i < no; ++ i) {
initRain();
if (ns4up) {
if (i == 0) {
document.write("l<ayer name="dot"+ i +"" left="1" ");
document.write("top="1" visibility="show"><font color="blue">");
document.write(",</font></layer>");
}
else {
document.write("l<ayer name="dot"+ i +"" left="1" ");
document.write("top="1" visibility="show"><font color="blue">");
document.write(",</font></layer>");
}
}
else
if (ie4up) {
if (i == 0) {
document.write("<div id="dot"+ i +"" style="POSITION: ");
document.write("absolute; Z-INDEX: "+ i +"; VISIBILITY: ");
document.write("visible; TOP: 15px; LEFT: 15px;"><font color="blue">");
document.write(",</font></div>");
}
else {
document.write("<div id="dot"+ i +"" style="POSITION: ");
document.write("absolute; Z-INDEX: "+ i +"; VISIBILITY: ");
document.write("visible; TOP: 15px; LEFT: 15px;"><font color="blue">");
document.write(",</font></div>");
}
}
}
function initRain() {
a = 6;
r
= 1;
sn = Math.sin(a);
cs = Math.cos(a);
cx = Math.random() * doc_width + 1;
cy = Math.random() * doc_height + 1;
x = r * sn + cx;
y = cy;
}
function makeRain() {
r = 1;
cx = Math.random() * doc_width + 1;
cy = 1;
x = r * sn + cx;
y = r * cs + cy;
}
function updateRain() {
r += s;
x = r * sn + cx;
y = r * cs + cy;
}
function raindropNS() {
for (i = 0; i < no; ++ i) {
updateRain();
if ((x <= 1) || (x >= (doc_width - 20)) || (y >= (doc_height - 20))) {
makeRain();
doc_width = self.innerWidth;
doc_height = self.innerHeight;
}
document.layers["dot"+i].top = y;
document.layers["dot"+i].left = x;
}
setTimeout("raindropNS()", speed);
}
function raindropIE() {
for (i = 0; i < no; ++ i) {
updateRain();
if ((x <= 1) || (x >= (doc_width - 20)) || (y >= (doc_height - 20))) {
makeRain();
doc_width = document.body.clientWidth;
doc_height = document.body.clientHeight;
}
document.all["dot"+i].style.pixelTop = y;
document.all["dot"+i].style.pixelLeft = x;
}
setTimeout("raindropIE()", speed);
}
if (ns4up) {
raindropNS();
}
else
if (ie4up) {
raindropIE();
}
</SCRIPT>
