/* 
Snow Effect Script 
Created and submitted by Altan d.o.o. (snow@altan.hr,  http://www.altan.hr/snow/index.html) 
Permission granted to Dynamicdrive.com to feature script in archive 
For full source code and installation instructions to this script, visit http://dynamicdrive.com 
*/ 
   

  //Configure below to change URL path to the snow image 
  var snowsrc="img/snow.gif" 
  // Configure below to change number of snow to render 
  var no = 15; 

  var ns4up = (document.layers) ? 1 : 0;  // browser sniffer 
  var ie4up = (document.all) ? 1 : 0; 

  var dx, xp, yp;    // coordinate and position variables 
  var am, stx, sty;  // amplitude and step variables 
  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; 
  } 

  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 
    if (ns4up) {                      // set layers 
      if (i == 0) { 
        document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><a href=\"http://dynamicdrive.com/\"><img src='"+snowsrc+"' border=\"0\"></a></layer>");

      } else { 
        document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><img src='"+snowsrc+"' border=\"0\"></layer>");

      } 
    } else if (ie4up) { 
      if (i == 0) { 
        document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><a href=\"http://dynamicdrive.com\"><img src='"+snowsrc+"' border=\"0\"></a></div>");

      } else { 
        document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><img src='"+snowsrc+"' border=\"0\"></div>");

      } 
    } 
  } 
   
  function snowNS() {  // Netscape main animation function 
    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 = self.innerWidth; 
        doc_height = self.innerHeight; 
      } 
      dx[i] += stx[i]; 
      document.layers["dot"+i].top = yp[i]; 
      document.layers["dot"+i].left = xp[i] + am[i]*Math.sin(dx[i]); 
    } 
    setTimeout("snowNS()", 10); 
  } 

  function snowIE() {  // IE main animation function 
    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.all["dot"+i].style.pixelTop = yp[i]; 
      document.all["dot"+i].style.pixelLeft = xp[i] + am[i]*Math.sin(dx[i]); 
    } 
    setTimeout("snowIE()", 10); 
  } 

  if (ns4up) { 
    snowNS(); 
  } else if (ie4up) { 
    snowIE(); 
  }