/*  Copyright Mihai Bazon, 2002, 2003  |  http://dynarch.com/mishoo/
 * The DHTML Calendar
 * Details and latest version at:
 * http://dynarch.com/mishoo/calendar.epl
 * This script is distributed under the GNU Lesser General Public License.
 * Read the entire license text here: http://www.gnu.org/licenses/lgpl.html
 */
Calendar.setup=function(params){
  function param_default(pname,def){if(typeof params[pname]=="undefined"){params[pname]=def;}};
  param_default("inputField",null);
  param_default("displayArea",null);
  param_default("button",null);
  param_default("eventName","click");
  param_default("ifFormat","%Y/%m/%d");
  param_default("daFormat","%Y/%m/%d");
  param_default("singleClick",true);
  param_default("disableFunc",null);
  param_default("dateStatusFunc",params["disableFunc"]);
  param_default("dateText",null);
  param_default("firstDay",null);
  param_default("align","Br");
  param_default("range",[1900,2999]);
  param_default("weekNumbers",true);
  param_default("flat",null);
  param_default("flatCallback",null);
  param_default("onSelect",null);
  param_default("onClose",null);
  param_default("onUpdate",null);
  param_default("date",null);
  param_default("showsTime",false);
  param_default("timeFormat","24");
  param_default("electric",true);
  param_default("step",2);
  param_default("position",null);
  param_default("cache",false);
  param_default("showOthers",false);
  param_default("multiple",null);
  var tmp=["inputField","displayArea","button"];
  for(var i in tmp){
    if(typeof params[tmp[i]]=="string"){params[tmp[i]]=document.getElementById(params[tmp[i]]);}
  }
  if(!(params.flat||params.multiple||params.inputField||params.displayArea||params.button)){
    alert("Calendar.setup:\n  Nothing to setup (no fields found).  Please check your code");
    return false;
  }
  function onSelect(cal){
    var p=cal.params;
    var update=(cal.dateClicked||p.electric);
    if(update&&p.inputField){
      p.inputField.value=cal.date.print(p.ifFormat);
      if(typeof p.inputField.onchange=="function"){p.inputField.onchange();}
    }
    if(update&&p.displayArea){p.displayArea.innerHTML=cal.date.print(p.daFormat);}
    if(update&&typeof p.onUpdate=="function"){p.onUpdate(cal);}
    if(update&&p.flat){
      if(typeof p.flatCallback=="function"){p.flatCallback(cal);}
    }
    if(update&&p.singleClick&&cal.dateClicked){cal.callCloseHandler();}
  };
  if(params.flat!=null){
    if(typeof params.flat=="string"){params.flat=document.getElementById(params.flat);}
    if(!params.flat){
      alert("Calendar.setup:\n  Flat specified but can't find parent.");
      return false;
    }
    var cal=new Calendar(params.firstDay,params.date,params.onSelect||onSelect);
    cal.showsOtherMonths=params.showOthers;
    cal.showsTime=params.showsTime;
    cal.time24=(params.timeFormat=="24");
    cal.params=params;
    cal.weekNumbers=params.weekNumbers;
    cal.setRange(params.range[0],params.range[1]);
    cal.setDateStatusHandler(params.dateStatusFunc);
    cal.getDateText=params.dateText;
    if(params.ifFormat){cal.setDateFormat(params.ifFormat);}
    if(params.inputField&&typeof params.inputField.value=="string"){cal.parseDate(params.inputField.value);}
    cal.create(params.flat);
    cal.show();
    return false;
  }
  var triggerEl=params.button||params.displayArea||params.inputField;
  triggerEl["on"+params.eventName]=function(){
    var dateEl=params.inputField||params.displayArea;
    var dateFmt=params.inputField?params.ifFormat:params.daFormat;
    var mustCreate=false;
    var cal=window.calendar;
    if(dateEl){params.date=Date.parseDate(dateEl.value||dateEl.innerHTML,dateFmt);}
    if(!(cal&&params.cache)){
      window.calendar=cal=new Calendar(params.firstDay,params.date,params.onSelect||onSelect,params.onClose||function(cal){cal.hide();});
      cal.showsTime=params.showsTime;
      cal.time24=(params.timeFormat=="24");
      cal.weekNumbers=params.weekNumbers;
      mustCreate=true;
    }
    else{if(params.date){cal.setDate(params.date);}cal.hide();}
    if(params.multiple){
      cal.multiple={};
      for(var i=params.multiple.length;--i>=0;){
        var d=params.multiple[i];
        var ds=d.print("%Y%m%d");
        cal.multiple[ds]=d;
      }
    }
    cal.showsOtherMonths=params.showOthers;
    cal.yearStep=params.step;
    cal.setRange(params.range[0],params.range[1]);
    cal.params=params;
    cal.setDateStatusHandler(params.dateStatusFunc);
    cal.getDateText=params.dateText;
    cal.setDateFormat(dateFmt);
    if(mustCreate){cal.create();}
    cal.refresh();
    if(!params.position){cal.showAtElement(params.button||params.displayArea||params.inputField,params.align);}
    else{cal.showAt(params.position[0],params.position[1]);}
    return false;
  };
  return cal;
};