Faire pleuvoir

<html>
<head>
<title></title>
</head>
<body>
<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("<layer name=\"dot"+ i +"\" left=\"1\" ");
      document.write("top=\"1\" visibility=\"show\"><font color=\"blue\">");
      document.write(",</font></layer>");
    } else {
      document.write("<layer 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[i] = 1;
  sn = Math.sin(a);
  cs = Math.cos(a);
  cx[i] = Math.random() * doc_width + 1;
  cy[i] = Math.random() * doc_height + 1;
  x[i] = r[i] * sn + cx[i];
  y[i] = cy[i];
}

function makeRain() {
  r[i] = 1;
  cx[i] = Math.random() * doc_width + 1;
  cy[i] = 1;
  x[i] = r[i] * sn + cx[i];
  y[i] = r[i] * cs + cy[i];
}

function updateRain() {
  r[i] += s;
  x[i] = r[i] * sn + cx[i];
  y[i] = r[i] * cs + cy[i];
}

function raindropNS() {
  for (i = 0; i < no; ++ i) {
    updateRain();
    if ((x[i] <= 1) || (x[i] >= (doc_width - 20)) || (y[i] >= (doc_height - 20))) {
      makeRain();
      doc_width = self.innerWidth;
      doc_height = self.innerHeight;
    }
    document.layers["dot"+i].top = y[i];
    document.layers["dot"+i].left = x[i];
  }
  setTimeout("raindropNS()", speed);
}

function raindropIE() {
  for (i = 0; i < no; ++ i) {
    updateRain();
    if ((x[i] <= 1) || (x[i] >= (doc_width - 20)) || (y[i] >= (doc_height - 20))) {
      makeRain();
      doc_width = document.body.clientWidth;
      doc_height = document.body.clientHeight;
    }
    document.all["dot"+i].style.pixelTop = y[i];
    document.all["dot"+i].style.pixelLeft = x[i];
  }
  setTimeout("raindropIE()", speed);
}

if (ns4up) {
  raindropNS();
}
else
if (ie4up) {
  raindropIE();
}
//-->
</script>

</body>
</html>

 

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