var cal;
var isFocus=false; //是否为焦点

/*选择日期 → 由 寒羽枫 2006-06-25 添加*/
function SelectDate(obj,strFormat)
{
    var date = new Date();
    var by = date.getFullYear()-5;  //最小值 → 50 年前
    var ey = date.getFullYear();  //最大值 → 50 年后
    cal = (cal==null) ? new Calendar(by, ey, 0) : cal;    //不用每次都初始化 2006-12-03 修正
    cal.dateFormatStyle = strFormat;
    cal.show(obj);
}
/*
 * 返回日期
 * @param d the delimiter
 * @param p the pattern of your date
 2006-06-25 由 寒羽枫 修改为根据用户指定的 style 来确定；
 */
String.prototype.toDate = function(style) {

  var y = this.substring(style.indexOf('y'),style.lastIndexOf('y')+1);//年
  var m = this.substring(style.indexOf('M'),style.lastIndexOf('M')+1);//月
  var d = this.substring(style.indexOf('d'),style.lastIndexOf('d')+1);//日
  if(isNaN(y)) y = new Date().getFullYear();
  if(isNaN(m)) m = new Date().getMonth();
  if(isNaN(d)) d = new Date().getDate();
  var dt ;
  eval ("dt = new Date('"+ y+"', '"+(m-1)+"','"+ d +"')");
  return dt;
}

/*
 * 格式化日期
 * @param   d the delimiter
 * @param   p the pattern of your date
 * @author  meizz
 */
Date.prototype.format = function(style) {
  var o = {
    "M+" : this.getMonth() + 1, //month
    "d+" : this.getDate(),      //day
    "h+" : this.getHours(),     //hour
    "m+" : this.getMinutes(),   //minute
    "s+" : this.getSeconds(),   //second
    "w+" : "天一二三四五六".charAt(this.getDay()),   //week
    "q+" : Math.floor((this.getMonth() + 3) / 3),  //quarter
    "S"  : this.getMilliseconds() //millisecond
  }
  if(/(y+)/.test(style)) {
    style = style.replace(RegExp.$1,
    (this.getFullYear() + "").substr(4 - RegExp.$1.length));
  }
  for(var k in o){
    if(new RegExp("("+ k +")").test(style)){
      style = style.replace(RegExp.$1,
        RegExp.$1.length == 1 ? o[k] :
        ("00" + o[k]).substr(("" + o[k]).length));
    }
  }
  return style;
}

/*
 * 日历类
 * @param   beginYear 1990
 * @param   endYear   2010
 * @param   lang      0(中文)|1(英语) 可自由扩充
 * @param   dateFormatStyle  "yyyy-MM-dd";
 * @version 2006-04-01
 * @author  KimSoft (jinqinghua [at] gmail.com)
 * @update
 */
function Calendar(beginYear, endYear, lang, dateFormatStyle) {
  this.beginYear = 1990;
  this.endYear = 2010;
  this.lang = 0;            //0(中文) | 1(英文)
  this.dateFormatStyle = "yyyy-MM-dd";

  if (beginYear != null && endYear != null){
    this.beginYear = beginYear;
    this.endYear = endYear;
  }
  if (lang != null){
    this.lang = lang
  }

  if (dateFormatStyle != null){
    this.dateFormatStyle = dateFormatStyle
  }

  this.dateControl = null;
  this.panel = this.getElementById("calendarPanel");
  this.container = this.getElementById("ContainerPanel");
  this.form  = null;

  this.date = new Date();
  this.year = this.date.getFullYear();
  this.month = this.date.getMonth();


  this.colors = {
  "cur_word"      : "#FFFFFF",  //当日日期文字颜色
  "cur_bg"        : "#00FF00",  //当日日期单元格背影色
  "sel_bg"        : "#FFCCCC",  //已被选择的日期单元格背影色 2006-12-03 寒羽枫添加
  "sun_word"      : "#FF0000",  //星期天文字颜色
  "sat_word"      : "#0000FF",  //星期六文字颜色
  "td_word_light" : "#333333",  //单元格文字颜色
  "td_word_dark"  : "#CCCCCC",  //单元格文字暗色
  "td_bg_out"     : "#EFEFEF",  //单元格背影色
  "td_bg_over"    : "#FFCC00",  //单元格背影色
  "tr_word"       : "#FFFFFF",  //日历头文字颜色
  "tr_bg"         : "#666666",  //日历头背影色
  "input_border"  : "#CCCCCC",  //input控件的边框颜色