// jSnow, a jQuery Plugin v1.1.mod2  
// Licensed under GPL licenses.  
// Copyright (C) 2009 Nikos "DuMmWiaM" Kontis, dummwiam@gmail.com  
// http://www.DuMmWiaM.com/jSnow  
// Modified 2009~

// Updated in 2009 by Shadowmint (http://shadowmint.blogspot.com/)
// Updated in 2010 by Serban Boanca (http://www.dj50.ro/)

(function($) {
  $.fn.jSnow = function(h) {
    var j = $.extend( {}, $.fn.jSnow.defaults, h);
    var k, WIN_HEIGHT;
    var l = j.flakes;
    var m = j.flakeCode;
    var n = j.flakeColor;
    var o = j.flakeMinSize;
    var p = j.flakeMaxSize;
    var q = j.fallingSpeedMin;
    var r = j.fallingSpeedMax;
    var s = j.interval;
    var t = j.zIndex;
    var vs = j.vSize;
    var fa = j.fadeAway;
    var fs = j.followScroll;
    setWaH();

    var useGif = false;
    if ($.browser.msie && (parseFloat($.browser.version) < 8))
      useGif = true;
    if ($.browser.msie && (parseFloat($.browser.version) < 8) && t == "auto")
      t = 0;
    var u = $("<div \/>");
    u.css( {
      width : k + "px",
      height : 1,
      display : "block",
      overflow : "visible",
      position : "absolute",
      left : "1px",
      zIndex : t
    });

    if (fs) {
      u.css('top', $("html").scrollTop() + 1 + "px");
    } else {
      u.css('top', j.top || 1);
    }

    $("body").prepend(u).css( {
      height : "100%"
    });
    $("html").css( {
      "overflow-y" : "scroll",
      "overflow-x" : "hidden"
    });
    var v = Array();
    generateFlake(l, false);
    setInterval(animateFlakes, s);
    window.onresize = setWaH;
    function setWaH() {
      k = $('body').width();
      if (!vs) {
        WIN_HEIGHT = window.innerHeight
            || document.documentElement.clientHeight
        WIN_HEIGHT -= 50;
      } else
        WIN_HEIGHT = vs;
    }
    ;
    if (fs) {
      window.onscroll = function() {
        u.css( {
          top : $("html").scrollTop() + "px"
        })
      };
    }
    function generateFlake(a, b) {
      a = a || 1;
      b = b || false;
      var i = 0;
      for (i = 0; i < a; i++) {
        var c = $("<span \/>").addClass( m[Math.floor(Math.random() * m.length)]);
        var d = o + Math.floor(Math.random() * p);

        c.css( {
          color : n[Math.floor(Math.random() * n.length)],
          fontSize : d + "px",
          display : "block",
          position : "absolute",
          cursor : "default",
          "z-index" : t
        });
        
        $(u).append(c);
        f_left = Math.floor(Math.random() * (k - c.width() - 50)) + 25;
        f_top = (b) ? -1 * c.height() : Math.floor(Math.random()
            * (WIN_HEIGHT - 50));
        var g = Math.floor(Math.random() * 90);
        jQuery.data(c, "posData", {
          top : f_top,
          left : f_left,
          rad : Math.random() * 50,
          i : Math.ceil(q + Math.random() * (r - q)),
          swingRange : g
        });
        c.css( {
          top : f_top + "px",
          left : f_left + "px"
        });
        v.push(c)
      }
    }
    ;
    function animateFlakes() {
      var i = 0;
      for (i = v.length - 1; i >= 0; i--) {
        var f = v[i];
        var a = jQuery.data(f, "posData");
        a.top += a.i;
        var b = Number();
        b = Math.cos((a.rad / 180) * Math.PI);
        a.rad += 2;
        var X = a.left - b * a.swingRange;

        if (fa) {
          op = (WIN_HEIGHT - a.top < 100) ? ((WIN_HEIGHT - a.top) / 100) : 1;
          f.css('opacity', op);
        }

        f.css( {
          top : a.top + "px",
          left : X + "px"
        });
        if (a.top > WIN_HEIGHT) {
          jQuery.removeData(f);
          f.remove();
          v.splice(i, 1);
          generateFlake(1, true)
        }
      }
    }
    ;
    return this
  };
  $.fn.jSnow.defaults = {
    flakes : 30,
    fallingSpeedMin : 1,
    fallingSpeedMax : 3,
    flakeMaxSize : 20,
    flakeMinSize : 10,
    flakeCode : [ "&bull;" ],
    flakeColor : [ "#fff" ],
    zIndex : "auto",
    interval : 50,
    top: 1
  }
})(jQuery);