/******************************************
* 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='imagenes/efectos/snow.gif'
  // Configure below to change number of snow to render
  var no = 10;
  // 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();

  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)
		}