<script type="text/javascript">  var no = 10; // snow number  var dx, xp, yp; // coordinate and position variables var am, stx, sty; // amplitude and step variables var i, doc_width = 800, doc_height = 600;  doc_width = document.body.clientWidth; doc_height = document.body.clientHeight;  dx = new Array(); xp = new Array(); yp = new Array(); am = new Array(); stx = new Array(); sty = new Array();  for (i = 0; i < no; ++ i) {  dx[i] = 0; // set coordinate variables xp[i] = Math.random()*(doc_width-50); // set position variables yp[i] = Math.random()*doc_height; am[i] = Math.random()*20; // set amplitude variables stx[i] = 0.02 + Math.random()/10; // set step variables sty[i] = 0.7 + Math.random(); // set step variables document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: 10"+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><img src=\"http://www.subetela.com/f/a/q/p/51898.gif\" border=\"0\"></div>"); }  function snow() { for (i = 0; i < no; ++ i) { // iterate for every dot yp[i] += sty[i]; if (yp[i] > doc_height-50) { xp[i] = Math.random()*(doc_width-am[i]-30); yp[i] = 0; stx[i] = 0.02 + Math.random()/10; sty[i] = 0.7 + Math.random(); doc_width = document.body.clientWidth; doc_height = document.body.clientHeight; } dx[i] += stx[i]; document.getElementById("dot"+i).style.top = yp[i]; document.getElementById("dot"+i).style.left = xp[i] + am[i]*Math.sin(dx[i]); } setTimeout("snow()", 20); }  snow(); </script>