/*******************************************************************************************
 
 * 创建对象   var c = new Calendar("c"); document.write(c);
 * 调用方法  c.show(arg1,arg2,arg3)
 * 参数1: 文本输入框(必填). 如 onfocus="c.show(this)";
 * 参数2: 按钮或其它可用单击事件的HTML元素(如果使用按钮方式则必填). 
          如 onclick="c.show(this,document.all.*)"  *=文本输入框名称
 * 参数3: 如果没有文本框没有值则使用该值初始化日历(选填). 
          如 onfocus="c.show(this,'2006-01-01')
   
 * 注: 参数顺序不分先后.  MSIE6/Opera8/FireFox1.5 下测试通过
   
   
************************如果您使用本日历控件 请保留该信息 谢谢! ***************************   
 * http://2lin.net
 * Email:caoailin@gmail.com 
 * QQ:38062022 
 * Creation date: 2006-10-29 
*********************************************************************************************/

function Calendar(objName)  
{		
	this.style = {
	
	   borderColor       		: "#94B2DE", //边框颜色
	   headerBackColor    		: "#E7EBFF", //表头背景颜色
	   headerFontColor    		: "#ffffff", //表头字体颜色
	   bodyBarBackColor			: "#f4f4f4", //日历标题背景色
	   bodyBarFontColor  		: "#000000", //日历标题字体色
	   bodyBackColor     		: "#ffffff", //日历背景色
	   bodyFontColor       	    : "#000000", //日历字体色 
	   bodyHolidayFontColor     : "#ff0000", //假日字体色
	   watermarkColor 		    : "#d4d4d4"  //背景水印色
	   
	};
	
	this.Obj = objName;		
	this.date = null;	
	this.mouseOffset = null;
	this.dateInput = null;
	this.timer = null;	
	this.drag = false;	
};

Calendar.prototype.toString = function()
{   
   var str = this.getStyle();
   str += '<div class="calendar" style="display:none;" onselectstart="return false" oncontextmenu="return false" id="Calendar">\n';
   str += '<div class="cdrWatermark" id="cdrWatermark"></div><div style="position:absolute;left:0px;top:0px;z-index:2;width:140px;">';
   str += this.getHeader();
   str += this.getBody();   
   str += '</div><div id="cdrMenu" style="position:absolute;left:0px;top:0px;z-index:3;display:none;"  onmouseover="' + this.Obj + '.showMenu(null);" onmouseout="' + this.Obj + '.hideMenu();"></div></div>';
   return str;
};

Calendar.prototype.getStyle = function()
{
    var str = '<style type="text/css">\n';
	str += '.calendar{position:absolute;width:142px;height:174px;background-color:'+this.style.bodyBackColor+';border:1px solid ' + this.style.borderColor + ';left:0px;top:0px;z-index:9999;}\n';
	str += '.cdrHeader{background-color:'+ this.style.headerBackColor +';width:140px;height:22px;font-size:12px;color:'+this.style.headerFontColor+';}\n';
	str += '.cdrWatermark{position:absolute;left:0px;top:55px;width:140px;font-family: Arial Black;font-size:50px;color:'+this.style.watermarkColor+';z-index:1;text-align:center;}\n';
	str += '.cdrBodyBar{background-color:' + this.style.bodyBarBackColor + ';font-size:12px;color:' + this.style.bodyBarFontColor + ';width:140px;height:20px;}\n';
	str += '.cdrBody{width:140px;font-size:12px;cursor:pointer;color:' + this.style.bodyFontColor + ';}\n';
	str += '.dayOver{border:1px solid black;background-color:#f4f4f4;}\n';
    str += '.menuOver{background-color:'+this.style.headerBackColor+';color:'+this.style.headerFontColor+';font-size:12px;}\n';
	str += '.headerOver{border:1px solid black;background-color:#f4f4f4;color:black;cursor:default;}\n';
	str += '.cdrMenu{font-size:12px;border:1px solid #000000;background-color:#ffffff;cursor:default;width:100%}\n';
	str += '</style>\n';	
	return str;
	
};

Calendar.prototype.getHeader = function()
{
    var str = '<table class="cdrHeader" cellSpacing="2" cellPadding="0"><tr align="center">\n';
	str += '<td onmouseover="this.className=\'headerOver\'" onmouseout="this.className=\'\'" id="previousYear" title="上一年份" style="cursor:pointer;width:10px;" onclick="'+this.Obj+'.onChangeYear(false);"><<</td>\n';
	str += '<td onmouseover="this.className=\'headerOver\'" onmouseout="this.className=\'\'" id="previousMonth" title="上一月份" style="cursor:pointer;width:10px;" onclick="'+this.Obj+'.onChangeMonth(false);"><</td>\n';
	str += '<td onmouseover="this.className=\'headerOver\'" onmouseout="this.className=\'\'" id="currentYear" style="width:50px;" onclick="' + this.Obj + '.showMenu(true);" onmouseout="' + this.Obj + '.hideMenu();">0</td>\n';
	str += '<td onmouseover="this.className=\'headerOver\'" onmouseout="this.className=\'\'" id="currentMonth" onclick="' + this.Obj + '.showMenu(false);" onmouseout="' + this.Obj + '.hideMenu();">0</td>\n';
	str += '<td onmouseover="this.className=\'headerOver\'" onmouseout="this.className=\'\'" id="nextMonth" title="下一月份" style="cursor:pointer;width:10px;" onclick="'+this.Obj+'.onChangeMonth(true);">></td>\n';
	str += '<td onmouseover="this.className=\'headerOver\'" onmouseout="this.className=\'\'" id="nextYear" title="下一年份" style="cursor:pointer;width:10px;" onclick="'+this.Obj+'.onChangeYear(true);">>></td></tr>\n';
	str += '</table>\n';
	return str;
};

Calendar.prototype.getBody = function()
{
   var n = 0;
   var str = '<table id="cdrBodyBar" class="cdrBodyBar" onmousedown="'+this.Obj+'.onDragStart()" onmousemove="'+this.Obj+'.onMouseMove()" style="cursor:move;" cellSpacing="2" cellPadding="0">\n';
   str += '<tr align="middle"><td>日</td><td>一</td><td>二</td><td>三</TD><td>四</td><td>五</td><td>六</td></tr></table>\n';
   str += '<table class="cdrBody" cellSpacing="2" cellPadding="0">\n';
   for(i = 0; i < 6; i++)
	{	  
	    str += '<tr align="center">';
		for(j = 0; j < 7; j++)
		{
			 str += '<td id="cdrDay'+(n++)+'" width="13%" height="16"></td>\n';
		}
		str += '</tr>';
	}
   str += '</table>\n';
   str += '<table class="cdrBodyBar" cellSpacing="2" cellPadding="0"><tr align="middle"><td style="cursor:pointer;" onclick="'+this.Obj+'.getToday();">今天</td></tr></table>\n';
   return str;
};

Calendar.prototype.getYearMenu = function(year)
{
 
   var str = '<table cellSpacing="0" class="cdrMenu" cellPadding="0">\n';
   for(i = 0; i < 10; i++)
	{	  
	    var _year = year + i;
		var _date = new Date(_year,this.date.getMonth(),this.date.getDate());
		
	    str += '<tr align="center"><td width="13%" height="16" ';
		if(this.date.getFullYear() != _year)
		{
			str += 'onmouseover="this.className=\'menuOver\'" onmouseout="this.className=\'\'" ';
		}
		else
		{
		   str += 'class="menuOver"';
		}
		str += 'onclick="' + this.Obj + '.bindDate(\'' + _date.toFormatString("-") + '\')">' + _year + '年</td>\n';		
		str += '</tr>';
	}

   str += '<tr align="center"><td><table style="font-size:12px;width:100%;" cellSpacing="0" cellPadding="0">\n';
   str += '<tr align="center"><td onmouseover="this.className=\'menuOver\'" onmouseout="this.className=\'\'" onclick="'+this.Obj+'.getYearMenu('+ (year - 10) + ')"><<</td>\n';
   str += '<td onmouseover="this.className=\'menuOver\'" onmouseout="this.className=\'\'" onclick="'+this.Obj+'.getYearMenu('+ (year + 10) +')">>></td><tr>\n';
   str += '</table></td></tr>\n';
   str += '</table>';
   
   var _menu = this.getObjById("cdrMenu");
	_menu.innerHTML = str;
   
};

Calendar.prototype.getMonthMenu = function()
{
   
   var str = '<table cellSpacing="0" class="cdrMenu" cellPadding="0">\n';
   for(i = 1; i <= 12; i++)
	{   
		var _date = new Date(this.date.getFullYear(),i-1,this.date.getDate());		
			
		str += '</tr><tr align="center"><td height="16" ';
		if(this.date.getMonth() + 1 != i)
		{
			str += 'onmouseover="this.className=\'menuOver\'" onmouseout="this.className=\'\'" ';
		}
		else
		{
		   str += 'class="menuOver"';
		}
		str += 'onclick="' + this.Obj + '.bindDate(\'' + _date.toFormatString("-") + '\')">'+i+'月</td></tr>\n';
	}
   str += '</table>';
   
   var _menu = this.getObjById("cdrMenu");
	_menu.innerHTML = str;   
};

Calendar.prototype.show = function(arg1, arg2 , arg3)
{
   if (arguments.length >  3  || arguments.length == 0)
   {
      alert("对不起！传入参数不对！" );
	  return;
	}   
	
   var _date = null;
   var _evObj = null;
   var _initValue = null  
	
   for(i = 0; i < arguments.length; i++)
   {
      if(typeof(arguments[i]) == "object" && arguments[i].type == "text")
	   {_date = arguments[i];}
	  else if(typeof(arguments[i]) == "object")
	   {_evObj = arguments[i];}
	  else if(typeof(arguments[i]) == "string")
	   {_initValue = arguments[i];}  
   }
    _evObj = _evObj || _date;
	
	if(!_date){alert("传入参数错误!"); return;}
	
   this.dateInput = _date;
   
   _date = _date.value;
   
   if(_date == "" && _initValue) _date = _initValue;   
   
   this.bindDate(_date);        
   
   var _target = this.getPosition(_evObj);   
   var _obj = this.getObjById("Calendar");
   _obj.style.display = ""; 
   
   _obj.style.left = _target.x;
   if((document.body.clientHeight - (_target.y + _evObj.clientHeight)) >= _obj.clientHeight)
   {        
      _obj.style.top = _target.y + _evObj.clientHeight;
	}
	else
	{	  
       _obj.style.top = _target.y - _obj.clientHeight;
	}
        
};


Calendar.prototype.hide = function()
{
    var obj = this.getObjById("Calendar");
	obj.style.display = "none";   
};

Calendar.prototype.bindDate = function(date)
{
   
	var _monthDays = new Array(31,30,31,30,31,30,31,31,30,31,30,31);		
	var _day = 1;	
	var _arr = date.split('-');		
    var _date = new Date(_arr[0],_arr[1]-1,_arr[2]);	
	if(isNaN(_date)) _date = new Date();	
	this.date = _date;
	this.bindHeader();	
	var _year = _date.getFullYear();
	var _month = _date.getMonth();
   
	 _monthDays[1] = ((_year%4==0)&&(_year%100!=0)||(_year%400==0))?29:28;

	for(i = 0; i < 42; i++)
	{
	    var _dayElement = this.getObjById("cdrDay" + i);
		
		_dayElement.onmouseover = Function(this.Obj + ".onMouseOver(this)");
		_dayElement.onmouseout = Function(this.Obj + ".onMouseOut(this)");
		_dayElement.onclick = Function(this.Obj + ".onClick(this)");
		this.onMouseOut(_dayElement);		
		
	    if(i >= new Date(_year,_month,1).getDay() && _day <= _monthDays[_month])
		{
		   _dayElement.innerHTML = _day;
		   
		   if(_day == _date.getDate())
		   {
		      this.onMouseOver(_dayElement);
			  _dayElement.onmouseover = Function("");   
		      _dayElement.onmouseout = Function(""); 					  			    
		   }
		        
		    
		   if(this.isHoliday(_year,_month,_day))
		   {
		      _dayElement.style.color = this.style.bodyHolidayFontColor;			  
		   }
		   
		   _dayElement.title = _year + '年' + (_month + 1)  + '月' + _day + '日';
		   _dayElement.value = _year + '-' + (_month + 1) + '-' + _day;	
		   
		   _day++;
		   
		}
		else
		{
		   _dayElement.innerHTML = "";
		   _dayElement.title = "";
		}	
	      
	}
	
	var _menu = this.getObjById("cdrMenu");
	_menu.style.display = "none";	
	
};

Calendar.prototype.bindHeader = function()
{
   var _curYear = this.getObjById("currentYear");
   var _curMonth = this.getObjById("currentMonth");
   var _watermark = this.getObjById("cdrWatermark");

   _curYear.innerHTML = this.date.getFullYear() + "年";
   _curMonth.innerHTML =  (this.date.getMonth() + 1) + "月";
   _watermark.innerHTML = this.date.getFullYear();     

};	

Calendar.prototype.getObjById = function(obj)
{
   if(document.getElementById)
   {
     return document.getElementById(obj);
   }
   else
   {
     alert("浏览器不支持!");
   }
};

Calendar.prototype.getToday = function()
{
   var _date = new Date();
   this.bindDate(_date.toFormatString("-"));
};	

Calendar.prototype.isHoliday = function(year,month,date)
{
   var _date = new Date(year,month,date);
   return (_date.getDay() == 6 || _date.getDay() == 0);
};

Calendar.prototype.onMouseOver = function(obj)
{
   obj.className = "dayOver";
};


Calendar.prototype.onMouseOut = function(obj)
{
   obj.className = "";
};	

Calendar.prototype.onClick = function(obj)
{
  if(obj.innerHTML != "")  this.dateInput.value = obj.value;
  this.hide();
};

Calendar.prototype.onChangeYear = function(isnext)
{
   var _year = this.date.getFullYear();
   var _month = this.date.getMonth() + 1;
   var _date = this.date.getDate();
      
   if(_year > 999 && _year <10000)
   {
        if(isnext){_year++;}else{ _year --;}
   }
   else
   {
     alert("年份超出范围（1000-9999）!");
   }
   this.bindDate(_year + '-' + _month + '-' + _date);
};

Calendar.prototype.onChangeMonth = function(isnext)
{
   var _year = this.date.getFullYear();
   var _month = this.date.getMonth() + 1;
   var _date = this.date.getDate();
   
   if(isnext){ _month ++;} else {_month--;}
   
   if(_year > 999 && _year <10000)
   { 
        if(_month < 1) {_month = 12; _year--;}
		if(_month > 12) {_month = 1; _year++;}
   }
   else
   {
     alert("年份超出范围（1000-9999）!");
   }  
   
   this.bindDate(_year + '-' + _month + '-' + _date);
};

Calendar.prototype.onMouseMove = function (evt)
{
    evt =  evt || window.event;    
	
	if(this.drag && evt.button == 1)
	{
	  var obj = this.getObjById("Calendar");
	  var mousePos = this.mouseCoords(evt); 
	  obj.style.left = mousePos.x - this.mouseOffset.x;
	  obj.style.top  = mousePos.y - this.mouseOffset.y;	  
	}
}

Calendar.prototype.onDragStart = function (evt)
{
    evt = evt || window.event;
	
    var obj = this.getObjById("Calendar");
    this.mouseOffset = this.getMouseOffset(obj,evt);
	this.drag = true;
}

Calendar.prototype.onDragEnd = function (evt)
{
    this.drag = false;
}


Calendar.prototype.mouseCoords = function(ev)
{
	if(ev.pageX || ev.pageY){
		return {x:ev.pageX, y:ev.pageY};
	}
	return {
		x:ev.clientX + document.body.scrollLeft - document.body.clientLeft,
		y:ev.clientY + document.body.scrollTop  - document.body.clientTop
	};
}

Calendar.prototype.getPosition = function(e)
{
	var left = 0;
	var top  = 0;
	while (e.offsetParent){
		left += e.offsetLeft + (e.currentStyle?(parseInt(e.currentStyle.borderLeftWidth)).NaN0():0);
		top  += e.offsetTop  + (e.currentStyle?(parseInt(e.currentStyle.borderTopWidth)).NaN0():0);
		e     = e.offsetParent;
	}

	left += e.offsetLeft + (e.currentStyle?(parseInt(e.currentStyle.borderLeftWidth)).NaN0():0);
	top  += e.offsetTop  + (e.currentStyle?(parseInt(e.currentStyle.borderTopWidth)).NaN0():0);

	return {x:left, y:top};
}

Calendar.prototype.getMouseOffset = function(target, ev)
{
	ev = ev || window.event;
	var docPos    = this.getPosition(target);
	var mousePos  = this.mouseCoords(ev);
	return {x:mousePos.x - docPos.x, y:mousePos.y - docPos.y};
}


Calendar.prototype.showMenu = function(isyear)
{
  var _menu = this.getObjById("cdrMenu");
  
  if(isyear != null)
  {
    
	var _obj = (isyear)? this.getObjById("currentYear") : this.getObjById("currentMonth");
	
	if(isyear)
	{
	   this.getYearMenu(this.date.getFullYear() - 5);	   
	}
	 else
	{
	   this.getMonthMenu();	   
	}
	
	_menu.style.top = _obj.offsetTop + _obj.offsetHeight;
	_menu.style.left = _obj.offsetLeft;	
	_menu.style.width = _obj.offsetWidth;
	
   }
	
	if (this.timer != null) clearTimeout(this.timer);
	
	_menu.style.display="";
	
}

Calendar.prototype.hideMenu = function()
{
    var _obj = this.getObjById("cdrMenu");
    this.timer = window.setTimeout(function(){_obj.style.display='none';},500);	
}

Number.prototype.NaN0 = function()
{
    return isNaN(this) ? 0 : this;
}

Date.prototype.toFormatString = function(fs)
{
    return this.getFullYear() + fs + (this.getMonth() + 1) + fs + this.getDate(); 
}


/*****************************************************结束************************************************************/