A Slacker's Guide to DHTML: Snow or Autumn Leaves Special FX

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Snow/Leaves FX

Instructions:

Shut up. Make sure you change the code that refers to the image "snow.gif" so that it points to the exact URL where you saved the image. And that means you gotta download these files, or only one of them for all I care:

This goes in the BODY of your document, right after the BODY tag, punk.

Select All & Copy

/*
Snow Effect Script
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 to this script, visit http://dynamicdrive.com
*/

//Configure below to change URL path to the snow image
  var snowsrc="snow.gif"
  // Configure below to change number of snow to render
  var no = 10;

var ns4up = (document.layers) ? 1 : 0;  // browser sniffer
  var ie4up = (document.all) ? 1 : 0;
  var ns6up = (document.getElementById&&!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||ns6up) {
    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||ns6up) {
      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);
  }

if (ns4up) {
    snowNS();
  } else if (ie4up||ns6up) {
    snowIE_NS6();
  }

</script>

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http://www.dynamicdrive.com
http://www.dhtmlzone.com
http://www.dhtmlshock.com

Just about every Dynamic HTML script on this site is ©opyright Dynamicdrive.com, DHTML Zone, DHTML Shock, or the person whose name appears in the credits to the script. Let it be known that I wrote NONE of them.