/*******************************************************************************************
 
 * 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,c.getObjById(*))"  *=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: 2006-11-22 
*********************************************************************************************/

function Calendar(objName)  
{		
	this.style = {
	
	   borderColor       		: "#909eff", //边框颜色
	   headerBackColor    		: "#909EFF", //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
	   moreDayColor             : "#cccccc" 
	   
	};
	
	this.showMoreDay = false; //是否显示上月和下月的日期
	
	this.Obj = objName;		
	this.date = null;
	
	this.mouseOffset = null;
	this.dateInput = null;
	this.timer = null;	
	
};

Calendar.prototype.toString = function()
{   
   var str = this.getStyle();
   str += '<div Author="alin" class="calendar" style="display:none;" onselectstart="return false" oncontextmenu="return false" id="Calendar">\n';
   str += '<div Author="alin" class="cdrWatermark" id="cdrWatermark"></div><div id="cdrBody" style="position:absolute;left:0px;top:0px;z-index:2;width:140px;">';
   str += this.getHeader();
   str += this.getBody();   
   str += '</div><div Author="alin" 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:140px!important;width /**/:142px;height:184px!important;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;height:122px!important; height /**/:110px;font-size:12px;cursor:pointer;color:' + this.style.bodyFontColor + ';}\n';
	str += '.dayOver{height:16px;padding:0px;border:1px solid black;background-color:#f4f4f4;}\n';
	str += '.dayOut{padding:1px;border:none;height:16px;}\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 += 'html>body #Calendar{width:142px;174px;}';
	str += '</style>\n';	
	return str;
	
};

Calendar.prototype.getHeader = function()
{
    var str = '<table Author="alin" class="cdrHeader" cellSpacing="2" cellPadding="0"><tr Author="alin" align="center">\n';
	str += '<td Author="alin" 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 Author="alin" 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 Author="alin" onmouseover="this.className=\'headerOver\'" id="currentYear" style="width:50px;" onclick="' + this.Obj + '.showMenu(true);" onmouseout="' + this.Obj + '.hideMenu();this.className=\'\';">0</td>\n';
	str += '<td Author="alin" onmouseover="this.className=\'headerOver\'" id="currentMonth" onclick="' + this.Obj + '.showMenu(false);" onmouseout="' + this.Obj + '.hideMenu();this.className=\'\';">0</td>\n';
	str += '<td Author="alin" 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 Author="alin" 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 = this.getBodyBar();
   str += '<table Author="alin" class="cdrBody" cellSpacing="2" cellPadding="0">\n';   
   for(i = 0; i < 6; i++)
	{	  
	    str += '<tr Author="alin" align="center">';
		for(j = 0; j < 7; j++)
		{
			 str += '<td Author="alin" class="dayOut" id="cdrDay'+(n++)+'" width="13%"></td>\n';
		}
		str += '</tr>';
	}
   str += '</table>\n';
   str += '<table Author="alin" class="cdrBodyBar" cellSpacing="2" cellPadding="0"><tr align="center" Author="alin"><td Author="alin" style="cursor:pointer;" onclick="'+this.Obj+'.getToday();">今天：'+new Date().toFormatString("yyyy年mm月dd日")+'</td></tr></table>\n';
   return str;
};

Calendar.prototype.getBodyBar = function()
{
   var str = '<table Author="alin_bar" id="cdrBodyBar" class="cdrBodyBar" style="cursor:move;" cellSpacing="2" cellPadding="0"><tr Author="alin_bar" align="center">\n';
   var day = new Array('日','一','二','三','四','五','六');
   for(i = 0; i < 7; i++)
   {
      str += '<td Author="alin_bar">' + day[i] + '</td>\n';     
   }
   str += '</tr></table>';
   return str;  
}

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

Calendar.prototype.getMonthMenu = function()
{
   
   var str = '<table Author="alin" 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 Author="alin" align="center"><td Author="alin" 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 = getObjById("cdrMenu");
	_menu.innerHTML = str;   
};

Calendar.prototype.show = function()
{
   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;
	inputObj = _date;
	targetObj = _evObj
	
	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 = getPosition(_evObj);   
   var _obj = getObjById("Calendar");
   _obj.style.display = ""; 
   

   _obj.style.left = _target.x + 'px';
   if((document.body.clientHeight - (_target.y + _evObj.clientHeight)) >= _obj.clientHeight)
   {        
      _obj.style.top = (_target.y + _evObj.clientHeight) + 'px';
	}
	else
	{	  
       _obj.style.top = (_target.y - _obj.clientHeight) + 'px';
	}
        
};


Calendar.prototype.hide = function()
{
    var obj = 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 _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();

	var _day = 1;	
	
	var _startDay = new Date(_year,_month,1).getDay();	
	var _previYear = _month == 0 ? _year - 1 : _year;
	var _previMonth = _month == 0 ? 11 : _month - 1;
	var _previDay = _monthDays[_previMonth];
	if (_previMonth == 1) _previDay =((_previYear%4==0)&&(_previYear%100!=0)||(_previYear%400==0))?29:28;	
	_previDay -= _startDay - 1;
	var _nextDay = 1;
   
	 _monthDays[1] = ((_year%4==0)&&(_year%100!=0)||(_year%400==0))?29:28;

	for(i = 0; i < 40; i++)
	{	
	    var _dayElement = 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);	 		
		_dayElement.style.color = "";
		
		if(i < _startDay)
		{
		    //获取上一个月的日期
			if(this.showMoreDay)
			{
			   var _previDate = new Date(_year,_month - 1,_previDay);
			   _dayElement.innerHTML = _previDay;
			   _dayElement.title = _previDate.toFormatString("yyyy年mm月dd日");
		       _dayElement.value = _previDate.toFormatString("-");	
			   _dayElement.style.color = this.style.moreDayColor;	
		   
		       _previDay++;
			   
			}else
			{
			   _dayElement.innerHTML = "";
		       _dayElement.title = "";
			}
		
		}
		else if(_day > _monthDays[_month])
		{
		   //获取下个月的日期
		   if(this.showMoreDay)
			{
			  var _nextDate = new Date(_year,_month + 1,_nextDay);
			  _dayElement.innerHTML = _nextDay;
			  _dayElement.title = _nextDate.toFormatString("yyyy年mm月dd日");
		      _dayElement.value = _nextDate.toFormatString("-");
			  _dayElement.style.color = this.style.moreDayColor;	
		   
		      _nextDay++;			   
			}else
			{
			   _dayElement.innerHTML = "";
		       _dayElement.title = "";
			}
		}
		else if(i >= new Date(_year,_month,1).getDay() && _day <= _monthDays[_month])
		{
           //获取本月日期
		   _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;			  
		   }
		   var _curDate = new Date(_year, _month, _day);

		   _dayElement.title =  _curDate.toFormatString("yyyy年mm月dd日");
		   _dayElement.value = _curDate.toFormatString("-");
		   		   
		   _day++;
		   
		}
		else
		{
		   _dayElement.innerHTML = "";
		   _dayElement.title = "";
		}	
	      
	}
	
	var _menu = getObjById("cdrMenu");
	_menu.style.display = "none";	
	
};


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

   _curYear.innerHTML = this.date.toFormatString("yyyy年");
   _curMonth.innerHTML =  this.date.toFormatString("mm月");
   _watermark.innerHTML = this.date.getFullYear();     

};	

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 = "dayOut";
};	

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

Calendar.prototype.hideMenu = function()
{
    var _obj = 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)
{
//修改日期格式为 YYYY-MM-DD
var month = this.getMonth()+1;
var date = this.getDate();
if(month<10){
	month = "0"+month;
}
if(date<10){
	date = "0"+date;
}
   if(fs.length == 1)
   { 
     return this.getFullYear() + fs + (month) + fs + date; 
   }
//alert(this.getMonth() + 1);

   fs = fs.replace("yyyy",this.getFullYear());
   fs = fs.replace("mm",month);
   fs = fs.replace("dd",date);
   return fs;
}

/******************************************公用方法及变量********************************************************/
var inputObj = null; //输入对象
var targetObj = null;	//单击目标对象
var dragObj = null; //拖动目标对象
var mouseOffset = null; //拖动目标的位置

//获取对象
function getObjById(obj)
{
   if(document.getElementById)
   {
     return document.getElementById(obj);
   }
   else
   {
     alert("浏览器不支持!");
   }
}

//获取鼠标位置
function mouseCoords(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
	};
}

//获取目标的绝对位置
function getPosition(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};
}
//获取鼠标的偏移值
function getMouseOffset(target, ev)
{
	ev = ev || window.event;
	var docPos    = getPosition(target);
	var mousePos  = mouseCoords(ev);
	return {x:mousePos.x - docPos.x, y:mousePos.y - docPos.y};
}

//关闭日历
function closeCalendar(evt){
	
	evt = evt || window.event; 
	var _target= evt.target || evt.srcElement; 
	
	if(!_target.getAttribute("Author") &&  _target != inputObj && _target != targetObj)
	 {
	   getObjById("Calendar").style.display = "none"; 	  
	 }  
}
//拖动日历开始
function dragStart(evt){

    evt = evt || window.event;	
	var _target= evt.target || evt.srcElement;
			 
	if(_target.getAttribute("Author") == "alin_bar") 
	{	   
	   dragObj = getObjById("Calendar");	   
	   mouseOffset = getMouseOffset(dragObj, evt);	 
	   
	}   
}
//拖动日历中
function drag(evt)
{
    evt =  evt || window.event;	
	if(dragObj)
	{		  
	  var mousePos = mouseCoords(evt); 
	  dragObj.style.left = (mousePos.x - mouseOffset.x) + 'px';
	  dragObj.style.top  = (mousePos.y - mouseOffset.y) + 'px';	  
	}
}
//拖动结束
function dragEnd(evt)
{
   dragObj = null;    
}

/**********************************End 公用方法**********************************************/


document.onclick = closeCalendar;

document.onmousedown = dragStart;

document.onmousemove = drag;

document.onmouseup = dragEnd;


/*****************************************************结束************************************************************/
var cdr = new Calendar("cdr");
  document.write(cdr);
  cdr.showMoreDay = true;