Script per la neve

<script type="text/javascript">
/******************************************
* Snow Effect Script- By Altan d.o.o. (http://www.altan.hr/snow/index.html)
* Visit Dynamic Drive DHTML code library (http://www.dynamicdrive.com/) for full source code
* Last updated Nov 9th, 05' by DD. This notice must stay intact for use
******************************************/
 
 //Configure below to change URL path to the snow image
 var snowsrc="http://www.hostfiles.org/files/20051204042017_snow3.gif"
 // Configure below to change number of snow to render
 var no = 18;
 // Configure whether snow should disappear after x seconds (0=never):
 var hidesnowtime = 0;
 // Configure how much snow should drop down before fading ("windowheight" or "pageheight")
 var snowdistance = "pageheight";

///////////Stop Config//////////////////////////////////

 var ie4up = (document.all) ? 1 : 0;
 var ns6up = (document.getElementById&&!document.all) ? 1 : 0;

       function iecompattest(){
       return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
       }

 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 (ns6up) {
   doc_width = self.innerWidth;
   doc_height = self.innerHeight;
 } else if (ie4up) {
   doc_width = iecompattest().clientWidth;
   doc_height = iecompattest().clientHeight;
 }

 dx = new Array();
 xp = new Array();
 yp = new Array();
 am = new Array();
 stx = new Array();
 sty = new Array();
 snowsrc=(snowsrc.indexOf("dynamicdrive.com")!=-1)? "snow.gif" : snowsrc
 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 (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 snowIE_NS6() {  // IE and NS6 main animation function
   doc_width = ns6up?window.innerWidth-10 : iecompattest().clientWidth-10;
 doc_height=(window.innerHeight && snowdistance=="windowheight")? window.innerHeight : (ie4up && snowdistance=="windowheight")?  iecompattest().clientHeight : (ie4up && !window.opera && snowdistance=="pageheight")? iecompattest().scrollHeight : iecompattest().offsetHeight;
   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();
     }
     dx[i] += stx[i];
     document.getElementById("dot"+i).style.top=yp[i]+"px";
     document.getElementById("dot"+i).style.left=xp[i] + am[i]*Math.sin(dx[i])+"px";  
   }
   snowtimer=setTimeout("snowIE_NS6()", 10);
 }

       function hidesnow(){
 if (window.snowtimer) clearTimeout(snowtimer)
 for (i=0; i<no; i++) document.getElementById("dot"+i).style.visibility="hidden"
       }
 

if (ie4up||ns6up){
   snowIE_NS6();
 if (hidesnowtime>0)
 setTimeout("hidesnow()", hidesnowtime*1000)
 }

</script>

// Configure below to change number of snow to render
 var no = 18;

//Configure below to change URL path to the snow image
 var snowsrc="http://www.hostfiles.org/files/20051204042017_snow3.gif"