// 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='1px';
      }
    
    $("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 \/>");  
        var d = o + Math.floor(Math.random() * p);  
        var e = m[Math.floor(Math.random() * m.length)];  
        if (e.indexOf(".gif") != -1 || e.indexOf(".png") != -1) {  
          var f = new Image();  
          if (useGif)  
            e = e.replace("png", "gif");  
          f.src = e;  
          e = "<img src='" + e + "' alt='jSnowFlake'>"  
        }  
        c.html(e).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  
  }  
})(jQuery);