var DatePicker = new Class({Implements:Options,d:"",today:"",choice:{},bodysize:{},limit:{},attachTo:null,picker:null,slider:null,oldContents:null,newContents:null,input:null,visual:null,
  options:{
    pickerClass:"datepicker",days:["Søndag","Mandag","Tirsdag","Onsdag","Torsdag","Fredag","Lørdag"],
    months:["Januar","Februar","Marts","April","Maj","Juni","Juli","August","September","Oktober","November","December"],
    dayShort:2,monthShort:3,startDay:1,timePicker:false,yearPicker:true,yearsPerPage:20,format:"d.m.Y",allowEmpty:false,
    inputOutputFormat:"U",animationDuration:400,useFadeInOut:!Browser.Engine.trident,startView:"month",positionOffset:{x:0,y:0},minDate: {date: '01-01-1996', format: 'd-m-Y'},debug:false,toggleElements:null,workflow:false,showValue:true,onShow:$empty,onClose:$empty,onSelect:$empty},
  initialize:function(b, a) {
    this.attachTo = b;
    this.setOptions(a).attach();
    if ($chk(this.options.minDate)) {
      this.options.minDate = this.unformat(this.options.minDate.date, this.options.minDate.format)
    }
    if ($chk(this.options.maxDate)) {
      this.options.maxDate = this.unformat(this.options.maxDate.date, this.options.maxDate.format)
    }
    document.addEvent("mousedown", this.close.bind(this))
  },
  attach:function(a, c) {
    if (!$chk(c)) {
      c = this.format(new Date(), this.options.format)
    }
    if ($chk(this.options.toggleElements)) {
      var b = $$(this.options.toggleElements);
      document.addEvents({keydown:function(d) {
        if (d.key == "tab") {
          this.close(null, true)
        }
      }.bind(this)})
    }
    $$(this.attachTo).each(function(f, e) {
      if (f.retrieve("datepicker")) {
        if (this.options.showValue && (a + "Clone" == f.getProperty("id"))) {
          f.set("value", this.format(new Date(this.unformat(c, this.options.inputOutputFormat)), this.options.format))
        }
        return
      }
      if ($chk(f.get("value"))) {
        var d = this.format(new Date(this.unformat(f.get("value"), this.options.inputOutputFormat)), this.options.format)
      } else {
        if (!this.options.allowEmpty) {
          var d = this.format(new Date(), this.options.format)
        } else {
          var d = ""
        }
      }
      var g = f.getStyle("display");
      var h = f.setStyle("display", this.options.debug ? g : "none").store("datepicker", true).clone().store("datepicker", true).removeProperty("name").setProperty("id", f.getProperty("id") + "Clone").setStyle("display", g).set("value", d).inject(f, "after");
      if ($chk(this.options.toggleElements)) {
        b[e].setStyle("cursor", "pointer").addEvents({click:function(i) {
          this.onFocus(f, h)
        }.bind(this)});
        h.addEvents({blur:function() {
          f.set("value", h.get("value"))
        }})
      } else {
        h.addEvents({keydown:function(i) {
          if (this.options.allowEmpty && (i.key == "delete" || i.key == "backspace")) {
            f.set("value", "");
            i.target.set("value", "");
            this.close(null, true)
          } else {
            if (i.key == "tab") {
              this.close(null, true)
            } else {
              i.stop()
            }
          }
        }.bind(this),focus:function(i) {
          this.onFocus(f, h)
        }.bind(this)})
      }
    }.bind(this))
  },
  onFocus:function(b, a) {
    if (datePickerInUse) {
      var c,e = a.getCoordinates();
      if ($chk(b.get("value"))) {
        c = this.unformat(b.get("value"), this.options.inputOutputFormat).valueOf()
      } else {
        c = new Date()
      }
      this.show({left:e.left + this.options.positionOffset.x,top:e.top + e.height + this.options.positionOffset.y}, c);
      this.input = b;
      this.visual = a;
      this.options.onShow() 
    }
  },
  dateToObject:function(a) {
    return{year:a.getFullYear(),month:a.getMonth(),day:a.getDate(),hours:1,minutes:1,seconds:1}
  },
  dateFromObject:function(a) {
    var b = new Date();
    ["year","month","day","hours","minutes","seconds"].each(function(d) {
      var c = a[d];
      if (!$chk(c)) {
        return
      }
      switch (d) {case"day":b.setDate(c);break;case"month":b.setMonth(c);break;case"year":b.setFullYear(c);break;case"hours":b.setHours(c);break;case"minutes":b.setMinutes(c);break;case"seconds":b.setSeconds(c);break}
    });
    return b
  },show:function(a, b) {
    if ($chk(b)) {
      this.d = new Date(b)
    } else {
      this.d = new Date()
    }
    this.today = new Date();
    this.choice = this.dateToObject(this.d);
    this.mode = (this.options.startView == "time" && !this.options.timePicker) ? "month" : this.options.startView;
    this.render();
    this.picker.setStyles(a)
  },
  render:function(b) {
    if (!$chk(this.picker)) {
      this.constructPicker()
    } else {
      var c = this.oldContents;
      this.oldContents = this.newContents;
      this.newContents = c;
      this.newContents.empty()
    }
    var a = new Date(this.d.getTime());
    this.limit = {right:false,left:false};
    if (this.mode == "decades") {
      this.renderDecades()
    } else {
      if (this.mode == "year") {
        this.renderYear()
      } else {
        if (this.mode == "time") {
          this.renderTime();
          this.limit = {right:true,left:true}
        } else {
          this.renderMonth()
        }
      }
    }
    this.picker.getElement(".previous").setStyle("visibility", this.limit.left ? "hidden" : "visible");
    this.picker.getElement(".next").setStyle("visibility", this.limit.right ? "hidden" : "visible");
    this.picker.getElement(".monthText").setStyle("cursor", this.allowZoomOut() ? "pointer" : "default");
    this.picker.getElement(".yearText").setStyle("cursor", this.allowZoomOut() ? "pointer" : "default");
    this.d = a;
    if (this.picker.getStyle("opacity") == 0) {
      this.picker.tween("opacity", 0, 1)
    }
    if ($chk(b)) {
      this.fx(b)
    }
  },
  fx:function(a) {
    if (a == "right") {
      this.oldContents.setStyles({left:0,opacity:1});
      this.newContents.setStyles({left:this.bodysize.x,opacity:1});
      this.slider.setStyle("left", 0).tween("left", 0, -this.bodysize.x)
    } else {
      if (a == "left") {
        this.oldContents.setStyles({left:this.bodysize.x,opacity:1});
        this.newContents.setStyles({left:0,opacity:1});
        this.slider.setStyle("left", -this.bodysize.x).tween("left", -this.bodysize.x, 0)
      } else {
        if (a == "fade") {
          this.slider.setStyle("left", 0);
          this.oldContents.setStyle("left", 0).set("tween", {duration:this.options.animationDuration / 2}).tween("opacity", 1, 0);
          this.newContents.setStyles({opacity:0,left:0}).set("tween", {duration:this.options.animationDuration}).tween("opacity", 0, 1)
        }
      }
    }
  },
  constructPicker:function() {
    this.picker = new Element("div", {"class":this.options.pickerClass}).inject(document.body);
    if (this.options.useFadeInOut) {
      this.picker.setStyle("opacity", 0).set("tween", {duration:this.options.animationDuration})
    }
    var d = new Element("div", {"class":"header"}).inject(this.picker);
    var c = new Element("div", {"class":"title"}).inject(d);
    new Element("div", {"class":"previous"}).addEvent("click", this.previous.bind(this)).set("text", "?").inject(d);
    new Element("div", {"class":"next"}).addEvent("click", this.next.bind(this)).set("text", "?").inject(d);
    new Element("div", {"class":"closeButton"}).addEvent("click", this.close.bindWithEvent(this, true)).set("text", "x").inject(d);
    new Element("span", {"class":"monthText"}).addEvent("click", this.zoomOut.bind(this, "month")).inject(c);
    new Element("span", {"class":"yearText"}).addEvent("click", this.zoomOut.bind(this, "year")).inject(c);
    var a = new Element("div", {"class":"body"}).inject(this.picker);
    this.bodysize = a.getSize();
    this.slider = new Element("div", {styles:{position:"absolute",top:0,left:0,width:2 * this.bodysize.x,height:this.bodysize.y}}).set("tween", {duration:this.options.animationDuration,transition:Fx.Transitions.Quad.easeInOut}).inject(a);
    this.oldContents = new Element("div", {styles:{position:"absolute",top:0,left:this.bodysize.x,width:this.bodysize.x,height:this.bodysize.y}}).inject(this.slider);
    this.newContents = new Element("div", {styles:{position:"absolute",top:0,left:0,width:this.bodysize.x,height:this.bodysize.y}}).inject(this.slider)
  },
  renderTime:function() {
    var a = new Element("div", {"class":"time"}).inject(this.newContents);
    this.picker.getElement(".monthText").set("text", this.format(this.d, "j M, Y"));
    new Element("input", {type:"text","class":"hour"}).set("value", this.leadZero(this.d.getHours())).addEvents({mousewheel:function(c) {
      var b = c.target;
      b.focus();
      if (c.wheel > 0) {
        if (b.get("value").toInt() < 23) {
          b.set("value", this.leadZero(b.get("value").toInt() + 1))
        }
      } else {
        if (b.get("value").toInt() > 0) {
          b.set("value", this.leadZero(b.get("value").toInt() - 1))
        }
      }
      c.stop()
    }.bind(this)}).set("maxlength", 2).inject(a);
    new Element("input", {type:"text","class":"minutes"}).set("value", this.leadZero(this.d.getMinutes())).addEvents({mousewheel:function(c) {
      var b = c.target;
      b.focus();
      if (c.wheel > 0) {
        if (b.get("value").toInt() < 59) {
          b.set("value", this.leadZero(b.get("value").toInt() + 1))
        }
      } else {
        if (b.get("value").toInt() > 0) {
          b.set("value", this.leadZero(b.get("value").toInt() - 1))
        }
      }
      c.stop()
    }.bind(this)}).set("maxlength", 2).inject(a);
    new Element("div", {"class":"separator"}).set("text", ":").inject(a);
    new Element("input", {type:"submit",value:"OK","class":"ok"}).addEvents({click:function(b) {
      b.stop();
      this.select($merge(this.dateToObject(this.d), {hours:this.picker.getElement(".hour").get("value").toInt(),minutes:this.picker.getElement(".minutes").get("value").toInt()}))
    }.bind(this)}).set("maxlength", 2).inject(a)
  },
  renderMonth:function() {
    var h = this.d.getMonth();
    this.picker.getElement(".monthText").set("text", this.options.months[h] + " ");
    this.picker.getElement(".yearText").set("text", this.d.getFullYear());
    this.d.setDate(1);
    while (this.d.getDay() != this.options.startDay) {
      this.d.setDate(this.d.getDate() - 1)
    }
    var a = new Element("div", {"class":"days"}).inject(this.newContents);
    var g = new Element("div", {"class":"titles"}).inject(a);
    var k,f,c,j,m;
    for (k = this.options.startDay; k < (this.options.startDay + 7); k++) {
      new Element("div", {"class":"title day day" + (k % 7)}).set("text", this.options.days[(k % 7)].substring(0, this.options.dayShort)).inject(g)
    }
    var b = false;
    var n = this.today.toDateString();
    var l = this.dateFromObject(this.choice).toDateString();
    for (f = 0; f < 42; f++) {
      c = [];
      c.push("day");
      c.push("day" + this.d.getDay());
      if (this.d.toDateString() == n) {
        c.push("today")
      }
      if (this.d.toDateString() == l) {
        c.push("selected")
      }
      if (this.d.getMonth() != h) {
        c.push("otherMonth")
      }
      if (f % 7 == 0) {
        m = new Element("div", {"class":"week week" + (Math.floor(f / 7))}).inject(a)
      }
      j = new Element("div", {"class":c.join(" ")}).set("text", this.d.getDate()).inject(m);
      if (this.limited("date")) {
        j.addClass("unavailable");
        if (this.d.getMonth() == h) {
          if (b) {
            this.limit.right = true
          } else {
            this.limit.left = true
          }
        }
      } else {
        b = true;
        j.addEvent("click", function(i, o) {
          if (this.options.timePicker) {
            this.d.setDate(o.day);
            this.d.setMonth(o.month);
            this.mode = "time";
            this.render("fade")
          } else {
            this.select(o)
          }
        }.bindWithEvent(this, {day:this.d.getDate(),month:this.d.getMonth(),year:this.d.getFullYear()}))
      }
      this.d.setDate(this.d.getDate() + 1)
    }
    if (!b) {
      this.limit.right = true
    }
  },
  renderYear:function() {
    var g = this.today.getMonth();
    var c = this.d.getFullYear() == this.today.getFullYear();
    var h = this.d.getFullYear() == this.choice.year;
    this.picker.getElement(".monthText").set("text", "");
    this.picker.getElement(".yearText").set("text", this.d.getFullYear());
    this.d.setMonth(0);
    var b,f;
    var d = false;
    var a = new Element("div", {"class":"months"}).inject(this.newContents);
    for (b = 0; b <= 11; b++) {
      f = new Element("div", {"class":"month month" + (b + 1) + (b == g && c ? " today" : "") + (b == this.choice.month && h ? " selected" : "")}).set("text", this.options.monthShort ? this.options.months[b].substring(0, this.options.monthShort) : this.options.months[b]).inject(a);
      if (this.limited("month")) {
        f.addClass("unavailable");
        if (d) {
          this.limit.right = true
        } else {
          this.limit.left = true
        }
      } else {
        d = true;
        f.addEvent("click", function(i, j) {
          this.d.setMonth(j);
          this.mode = "month";
          this.render("fade")
        }.bindWithEvent(this, this.d.getMonth()))
      }
      this.d.setMonth(this.d.getMonth() + 1)
    }
    if (!d) {
      this.limit.right = true
    }
  },
  renderDecades:function() {
    while (this.d.getFullYear() % this.options.yearsPerPage > 0) {
      this.d.setFullYear(this.d.getFullYear() - 1)
    }
    this.picker.getElement(".monthText").set("text", "");
    this.picker.getElement(".yearText").set("text", this.d.getFullYear() + "-" + (this.d.getFullYear() + this.options.yearsPerPage - 1));
    var b,f,d;
    var c = false;
    var a = new Element("div", {"class":"years"}).inject(this.newContents);
    for (b = 0; b < this.options.yearsPerPage; b++) {
      f = this.d.getFullYear();
      d = new Element("div", {"class":"year year" + b + (f == this.today.getFullYear() ? " today" : "") + (f == this.choice.year ? " selected" : "")}).set("text", f).inject(a);
      if (this.limited("year")) {
        d.addClass("unavailable");
        if (c) {
          this.limit.right = true
        } else {
          this.limit.left = true
        }
      } else {
        c = true;
        d.addEvent("click", function(g, h) {
          this.d.setFullYear(h);
          if (this.options.workflow) {
            this.mode = "year"
          } else {
            this.mode = "month"
          }
          this.render("fade")
        }.bindWithEvent(this, f))
      }
      this.d.setFullYear(this.d.getFullYear() + 1)
    }
    if (!c) {
      this.limit.right = true
    }
  },
  limited:function(c) {
    var b = $chk(this.options.minDate);
    var d = $chk(this.options.maxDate);
    if (!b && !d) {
      return false
    }
    switch (c) {case"year":return(b && this.d.getFullYear() < this.options.minDate.getFullYear()) || (d && this.d.getFullYear() > this.options.maxDate.getFullYear());case"month":var a = ("" + this.d.getFullYear() + this.leadZero(this.d.getMonth())).toInt();return b && a < ("" + this.options.minDate.getFullYear() + this.leadZero(this.options.minDate.getMonth())).toInt() || d && a > ("" + this.options.maxDate.getFullYear() + this.leadZero(this.options.maxDate.getMonth())).toInt();case"date":return(b && this.d < this.options.minDate) || (d && this.d > this.options.maxDate)}
  },
  allowZoomOut:function() {
    if (this.mode == "decades") {
      return false
    }
    if (this.mode == "year" && !this.options.yearPicker) {
      return false
    }
    return true
  },zoomOut:function(a) {
    if ($chk(a)) {
      this.mode = a
    }
    if (!this.allowZoomOut()) {
      return
    }
    if (this.mode == "year") {
      this.mode = "decades"
    } else {
      if (this.mode == "time") {
        this.mode = "month"
      } else {
        this.mode = "year"
      }
    }
    this.render("fade")
  },
  previous:function() {
    if (this.mode == "decades") {
      this.d.setFullYear(this.d.getFullYear() - this.options.yearsPerPage)
    } else {
      if (this.mode == "year") {
        this.d.setFullYear(this.d.getFullYear() - 1)
      } else {
        if (this.mode == "month") {
          this.d.setMonth(this.d.getMonth() - 1)
        }
      }
    }
    this.render("left")
  },
  next:function() {
    if (this.mode == "decades") {
      this.d.setFullYear(this.d.getFullYear() + this.options.yearsPerPage)
    } else {
      if (this.mode == "year") {
        this.d.setFullYear(this.d.getFullYear() + 1)
      } else {
        if (this.mode == "month") {
          this.d.setMonth(this.d.getMonth() + 1)
        }
      }
    }
    this.render("right")
  },
  close:function(c, b) {
    if (!$(this.picker)) {
      return
    }
    var a = ($chk(c) && c.target != this.picker && !this.picker.hasChild(c.target) && c.target != this.visual);
    if (b || a) {
      if (this.options.useFadeInOut) {
        this.picker.set("tween", {duration:this.options.animationDuration / 2,onComplete:this.destroy.bind(this)}).tween("opacity", 1, 0)
      } else {
        this.destroy()
      }
    }
  },
  destroy:function() {
    this.picker.destroy();
    this.picker = null;
    this.options.onClose()
  },
  select:function(a) {
    this.choice = $merge(this.choice, a);
    var b = this.dateFromObject(this.choice);
    this.input.set("value", this.format(b, this.options.inputOutputFormat));
    this.visual.set("value", this.format(b, this.options.format));
    this.options.onSelect();
    this.close(null, true)
  },
  leadZero:function(a) {
    return a < 10 ? "0" + a : a
  },
  format:function(c, g) {
    var e = "";
    var d = c.getHours();
    var a = c.getMonth();
    for (var b = 0; b < g.length; b++) {
      switch (g.charAt(b)) {case"\\":b++;e += g.charAt(b);break;case"y":e += (100 + c.getYear() + "").substring(1);break;case"Y":e += c.getFullYear();break;case"m":e += this.leadZero(a + 1);break;case"n":e += (a + 1);break;case"M":e += this.options.months[a].substring(0, this.options.monthShort);break;case"F":e += this.options.months[a];break;case"d":e += this.leadZero(c.getDate());break;case"j":e += c.getDate();break;case"D":e += this.options.days[c.getDay()].substring(0, this.options.dayShort);break;case"l":e += this.options.days[c.getDay()];break;case"G":e += d;break;case"H":e += this.leadZero(d);break;case"g":e += (d % 12 ? d % 12 : 12);break;case"h":e += this.leadZero(d % 12 ? d % 12 : 12);break;case"a":e += (d > 11 ? "pm" : "am");break;case"A":e += (d > 11 ? "PM" : "AM");break;case"i":e += this.leadZero(c.getMinutes());break;case"s":e += this.leadZero(c.getSeconds());break;case"U":e += Math.floor(c.valueOf() / 1000);break;default:e += g.charAt(b)}
    }
    return e
  },
  unformat:function(h, j) {
    var k = new Date();
    var e = {};
    var l,b;
    for (var g = 0; g < j.length; g++) {
      l = j.charAt(g);
      switch (l) {case"\\":r = null;g++;break;case"y":r = "[0-9]{2}";break;case"Y":r = "[0-9]{4}";break;case"m":r = "0[1-9]|1[012]";break;case"n":r = "[1-9]|1[012]";break;case"M":r = "[A-Za-z]{" + this.options.monthShort + "}";break;case"F":r = "[A-Za-z]+";break;case"d":r = "0[1-9]|[12][0-9]|3[01]";break;case"j":r = "[1-9]|[12][0-9]|3[01]";break;case"D":r = "[A-Za-z]{" + this.options.dayShort + "}";break;case"l":r = "[A-Za-z]+";break;case"G":case"H":case"g":case"h":r = "[0-9]{1,2}";break;case"a":r = "(am|pm)";break;case"A":r = "(AM|PM)";break;case"i":case"s":r = "[012345][0-9]";break;case"U":r = "-?[0-9]+$";break;default:r = null}
      if ($chk(r)) {
        b = h.match("^" + r);
        if ($chk(b)) {
          e[l] = b[0];
          h = h.substring(e[l].length)
        } else {
          if (this.options.debug) {
            alert("Fatal Error in DatePicker\n\nUnexpected format at: '" + h + "' expected format character '" + l + "' (pattern '" + r + "')")
          }
          return k
        }
      } else {
        h = h.substring(1)
      }
    }
    for (l in e) {
      var f = e[l];
      switch (l) {case"y":k.setFullYear(f < 30 ? 2000 + f.toInt() : 1900 + f.toInt());break;case"Y":k.setFullYear(f);break;case"m":case"n":k.setMonth(f - 1);break;case"M":f = this.options.months.filter(function(c, a) {
        return c.substring(0, this.options.monthShort) == f
      }.bind(this))[0];case"F":k.setMonth(this.options.months.indexOf(f));break;case"d":case"j":k.setDate(f);break;case"G":case"H":k.setHours(f);break;case"g":case"h":if (e.a == "pm" || e.A == "PM") {
        k.setHours(f == 12 ? 0 : f.toInt() + 12)
      } else {
        k.setHours(f)
      }break;case"i":k.setMinutes(f);break;case"s":k.setSeconds(f);break;case"U":k = new Date(f.toInt() * 1000)}
    }
    return k
  }});