/******************************************
* 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 original source code
* Modified 2009 by atronet.de
******************************************/
  
  //Configure below to change URL path to the snow image
  var snowsrc="js/snow.gif"
  // Configure below to change number of snow to render
  var no = 20;
  // 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";

///////////Config End//////////////////////////////////

  var ie4up = (document.all) ? 1 : 0;
  var ns6up = (document.getElementById&&!document.all) ? 1 : 0;
//  var opera = browserinfos.match(/Opera/);

  var doc_width = 800, doc_height = 600; 
  var dx, xp, yp;    // coordinate and position variables
  var am, stx, sty;  // amplitude and step variables
  var i;

  dx = new Array();
  xp = new Array();
  yp = new Array();
  am = new Array();
  stx = new Array();
  sty = new Array();

  doc_width = ie4up ? iecompattest().clientWidth-10 : window.innerWidth-10 ;
  doc_height=(window.innerHeight && snowdistance=="windowheight")?
		window.innerHeight :
		(ie4up && snowdistance=="windowheight")?
			iecompattest().clientHeight :
			(ie4up && !window.opera && snowdistance=="pageheight")?
				iecompattest().scrollHeight :
				(ie4up) ? // by atronet.de 
					iecompattest().offsetHeight :
					window.innerHeight ;


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

  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-50);
    am[i] = Math.random()*15;         // 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) {
        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 snow() {  // 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();
      }
      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("snow()", 20);
  }

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

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