/*
powered by ly200.com		http://www.ly200.com
广州联雅网络科技有限公司		020-83226791
*/

var cal;
var isfocus=false; //是否为焦点
function selectdate(obj){
    var date=new date();
    var by=date.getfullyear()-10; //最小值 → 10 年前
    var ey=date.getfullyear()+10; //最大值 → 10 年后
    cal=(cal==null)?new calendar(by, ey):cal;
    cal.show(obj);
}

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;
}

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+':''.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   dateformatstyle 'yyyy-mm-dd';
*/
function calendar(beginyear, endyear){
	this.beginyear=1990;
	this.endyear=2010;
	this.dateformatstyle='yyyy-mm-dd';
	
	if(beginyear!=null && endyear!=null){
		this.beginyear=beginyear;
		this.endyear=endyear;
	}
	
	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'       :'#83a6f4', //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
		'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
		'input_bg'     :'#efefef'  //input控件的背影色
	}
	
	this.draw();
	this.bindyear();
	this.bindmonth();
	this.changeselect();
	this.binddata();
}

calendar.prototype.draw=function(){
	calendar=this;
	
	var mvary=[];
	mvary[mvary.length]=' <div name="calendarform" style="margin:0px;">';
	mvary[mvary.length]='    <table width="100%" border="0" cellpadding="0" cellspacing="1">';
	mvary[mvary.length]='      <tr>';
	mvary[mvary.length]='        <th align="left" width="1%"><input style="border:1px solid '+calendar.colors["input_border"]+'; background:'+calendar.colors["input_bg"]+'; width:16px; height:20px; line-height:20px;" name="prevmonth" type="button" id="prevmonth" value="&lt;" /></th>';
	mvary[mvary.length]='        <th align="center" width="98%" nowrap><select name="calendaryear" id="calendaryear" style="font-size:12px;"></select><select name="calendarmonth" id="calendarmonth" style="font-size:12px;"></select></th>';
	mvary[mvary.length]='        <th align="right" width="1%"><input style="border:1px solid '+calendar.colors["input_border"]+'; background:'+calendar.colors["input_bg"]+'; width:16px; height:20px; line-height:20px;" name="nextmonth" type="button" id="nextmonth" value="&gt;" /></th>';
	mvary[mvary.length]='      </tr>';
	mvary[mvary.length]='    </table>';
	mvary[mvary.length]='    <table id="calendartable" width="100%" style="border:0px solid #ccc; background-color:#fff" border="0" cellpadding="3" cellspacing="1">';
	mvary[mvary.length]='      <tr>';
	for(var i=0; i<7; i++){
		mvary[mvary.length]='      <th style="font-weight:normal; background-color:'+calendar.colors["tr_bg"]+'; color:'+calendar.colors["tr_word"]+';">'+eval('ly200jslang._date._weeks._'+i)+'</th>';
	}
	mvary[mvary.length]='      </tr>';
	for(var i=0; i<6;i++){
		mvary[mvary.length]='    <tr align="center">';
		for(var j=0; j<7; j++){
			if(j==0){
				mvary[mvary.length]=' <td style="cursor:default;color:'+calendar.colors["sun_word"]+';"></td>';
			}else if(j==6){
				mvary[mvary.length]=' <td style="cursor:default;color:'+calendar.colors["sat_word"]+';"></td>';
			}else{
				mvary[mvary.length]=' <td style="cursor:default;"></td>';
			}
		}
		mvary[mvary.length]='    </tr>';
	}
	mvary[mvary.length]='      <tr style="background-color:'+calendar.colors["input_bg"]+';">';
	mvary[mvary.length]='        <th colspan="2"><input name="calendarclear" type="button" id="calendarclear" value="'+ly200jslang._date._clear+'" style="border:1px solid '+calendar.colors["input_border"]+'; background:'+calendar.colors["input_bg"]+'; width:100%; height:20px; line-height:20px; font-size:12px;"/></th>';
	mvary[mvary.length]='        <th colspan="3"><input name="calendartoday" type="button" id="calendartoday" value="'+ly200jslang._date._today+'" style="border:1px solid '+calendar.colors["input_border"]+'; background:'+calendar.colors["input_bg"]+'; width:100%; height:20px; line-height:20px; font-size:12px;"/></th>';
	mvary[mvary.length]='        <th colspan="2"><input name="calendarclose" type="button" id="calendarclose" value="'+ly200jslang._date._close+'" style="border:1px solid '+calendar.colors["input_border"]+'; background:'+calendar.colors["input_bg"]+'; width:100%; height:20px; line-height:20px; font-size:12px;"/></th>';
	mvary[mvary.length]='      </tr>';
	mvary[mvary.length]='    </table>';
	mvary[mvary.length]=' </div>';
	this.panel.innerhtml=mvary.join('');
	
	var obj=this.getelementbyid('prevmonth');
	obj.onclick=function (){calendar.goprevmonth(calendar);}
	obj.onblur=function (){calendar.onblur();}
	this.prevmonth= obj;
	
	obj=this.getelementbyid('nextmonth');
	obj.onclick=function (){calendar.gonextmonth(calendar);}
	obj.onblur=function (){calendar.onblur();}
	this.nextmonth= obj;
	
	
	obj=this.getelementbyid('calendarclear');
	obj.onclick=function (){calendar.datecontrol.value='';calendar.hide();}
	this.calendarclear=obj;
	
	obj=this.getelementbyid('calendarclose');
	obj.onclick=function (){calendar.hide();}
	this.calendarclose=obj;
	
	obj=this.getelementbyid('calendaryear');
	obj.onchange=function (){calendar.update(calendar);}
	obj.onblur=function (){calendar.onblur();}
	this.calendaryear=obj;
	
	obj=this.getelementbyid('calendarmonth');
	with(obj)
	{
		onchange=function (){calendar.update(calendar);}
		onblur=function (){calendar.onblur();}
	}this.calendarmonth=obj;
	
	obj=this.getelementbyid('calendartoday');
	obj.onclick=function (){
		var today=new date();
		calendar.date=today;
		calendar.year=today.getfullyear();
		calendar.month=today.getmonth();
		calendar.changeselect();
		calendar.binddata();
		calendar.datecontrol.value=today.format(calendar.dateformatstyle);
		calendar.hide();
	}
	this.calendartoday=obj;
}

//年份下拉框绑定数据
calendar.prototype.bindyear=function(){
	var cy=this.calendaryear;
	cy.length=0;
	for(var i=this.beginyear; i <= this.endyear; i++){
		cy.options[cy.length]=new option(i, i);
	}
}

//月份下拉框绑定数据
calendar.prototype.bindmonth=function(){
	var cm=this.calendarmonth;
	cm.length=0;
	for(var i=0; i<12; i++){
		cm.options[cm.length]=new option(eval('ly200jslang._date._months._'+i), i);
	}
}

//向前一月
calendar.prototype.goprevmonth=function(e){
	if(this.year==this.beginyear && this.month==0){return;}
	this.month--;
	if(this.month==-1){
		this.year--;
		this.month=11;
	}
	this.date=new date(this.year, this.month, 1);
	this.changeselect();
	this.binddata();
}

//向后一月
calendar.prototype.gonextmonth=function(e){
	if(this.year==this.endyear && this.month==11){return;}
	this.month++;
	if(this.month==12){
		this.year++;
		this.month=0;
	}
	this.date=new date(this.year, this.month, 1);
	this.changeselect();
	this.binddata();
}

//改变select选中状态
calendar.prototype.changeselect=function(){
	var cy=this.calendaryear;
	var cm=this.calendarmonth;
	for(var i= 0; i<cy.length; i++){
		if(cy.options[i].value==this.date.getfullyear()){
		  cy[i].selected=true;
		  break;
		}
	}
	for(var i= 0; i<cm.length; i++){
		if(cm.options[i].value==this.date.getmonth()){
		  cm[i].selected=true;
		  break;
		}
	}
}

//更新年、月
calendar.prototype.update=function (e){
	this.year=e.calendaryear.options[e.calendaryear.selectedindex].value;
	this.month=e.calendarmonth.options[e.calendarmonth.selectedindex].value;
	this.date=new date(this.year, this.month, 1);
	this.changeselect();
	this.binddata();
}

//绑定数据到月视图
calendar.prototype.binddata=function (){
	var calendar=this;
	var datearray=this.getmonthviewarray(this.date.getfullyear(), this.date.getmonth());
	var tds=this.getelementbyid('calendartable').getelementsbytagname('td');
	for(var i=0; i<tds.length; i++){
	tds[i].style.backgroundcolor=calendar.colors['td_bg_out'];
		tds[i].onclick=function(){return;}
		tds[i].onmouseover=function(){return;}
		tds[i].onmouseout=function(){return;}
		if(i > datearray.length-1) break;
		tds[i].innerhtml=datearray[i];
		if(datearray[i]!='&nbsp;'){
			tds[i].onclick=function(){
			if(calendar.datecontrol!=null){
				calendar.datecontrol.value=new date(calendar.date.getfullyear(),
					calendar.date.getmonth(),
					this.innerhtml).format(calendar.dateformatstyle);
			}
			calendar.hide();
			}
			tds[i].onmouseover=function(){
				this.style.backgroundcolor=calendar.colors['td_bg_over'];
			}
			tds[i].onmouseout=function(){
				this.style.backgroundcolor=calendar.colors['td_bg_out'];
			}
			if(new date().format(calendar.dateformatstyle)==
				new date(calendar.date.getfullyear(),
					calendar.date.getmonth(),
					datearray[i]).format(calendar.dateformatstyle)) {
					tds[i].style.backgroundcolor=calendar.colors['cur_bg'];
					tds[i].onmouseover=function(){
						this.style.backgroundcolor=calendar.colors['td_bg_over'];
					}
				tds[i].onmouseout=function(){
					this.style.backgroundcolor=calendar.colors['cur_bg'];
				}
			}//end if
			 
			//设置已被选择的日期单元格背影色
			if(calendar.datecontrol!=null && calendar.datecontrol.value==new date(calendar.date.getfullyear(),
				calendar.date.getmonth(),
				datearray[i]).format(calendar.dateformatstyle)) {
				tds[i].style.backgroundcolor=calendar.colors['sel_bg'];
				tds[i].onmouseover=function(){
					this.style.backgroundcolor=calendar.colors['td_bg_over'];
				}
				tds[i].onmouseout=function(){
					this.style.backgroundcolor=calendar.colors['sel_bg'];
				}
			}
		}
	}
}

//根据年、月得到月视图数据(数组形式)
calendar.prototype.getmonthviewarray=function (y, m) {
	var mvarray=[];
	var dayoffirstday=new date(y, m, 1).getday();
	var daysofmonth=new date(y, m+1, 0).getdate();
	for(var i=0; i<42; i++) {
		mvarray[i]='&nbsp;';
	}
	for(var i=0; i<daysofmonth; i++){
		mvarray[i+dayoffirstday]=i+1;
	}
	return mvarray;
}

//扩展 document.getelementbyid(id) 多浏览器兼容性 from meizz tree source
calendar.prototype.getelementbyid=function(id){
	if(typeof(id)!='string' || id=='') return null;
	if(document.getelementbyid) return document.getelementbyid(id);
	if(document.all) return document.all(id);
	try{return eval(id);}catch(e){return null;}
}

//扩展 object.getelementsbytagname(tagname)
calendar.prototype.getelementsbytagname=function(object, tagname){
	if(document.getelementsbytagname) return document.getelementsbytagname(tagname);
	if(document.all) return document.all.tags(tagname);
}

//取得html控件绝对位置
calendar.prototype.getabspoint=function (e){
	var x=e.offsetleft;
	var y=e.offsettop;
	while(e=e.offsetparent){
		x+=e.offsetleft;
		y+=e.offsettop;
	}
	return {'x':x, 'y':y};
}

//显示日历
calendar.prototype.show=function (dateobj, popcontrol) {
	if(dateobj==null){
		throw new error('arguments[0] is necessary')
	}
	this.datecontrol=dateobj;
	
	this.date=(dateobj.value.length > 0)?new date(dateobj.value.todate(this.dateformatstyle)):new date() ;//若为空则显示当前月份
	this.year=this.date.getfullyear();
	this.month=this.date.getmonth();
	this.changeselect();
	this.binddata();
	if(popcontrol==null){
		popcontrol=dateobj;
	}
	var xy=this.getabspoint(popcontrol);
	this.panel.style.left=xy.x-25+'px';
	this.panel.style.top=(xy.y+dateobj.offsetheight)+'px';
	
	this.panel.style.display='';
	this.container.style.display='';
	
	dateobj.onblur=function(){calendar.onblur();}
	this.container.onmouseover=function(){isfocus=true;}
	this.container.onmouseout=function(){isfocus=false;}
}

//隐藏日历
calendar.prototype.hide=function() {
	this.panel.style.display='none';
	this.container.style.display='none';
	isfocus=false;
}

//焦点转移时隐藏日历
calendar.prototype.onblur=function() {
    if(!isfocus){this.hide();}
}
document.write('<div id="containerpanel" style="display:none;"><div id="calendarpanel" style="position:absolute; display:none; z-index:9999;');
document.write('background:#fff; border:1px solid #ccc; width:175px; font-size:12px; margin-left:25px;"></div>');
if(document.all)
{
	document.write('<iframe style="position:absolute;z-index:2000;width:expression(this.previoussibling.offsetwidth);');
	document.write('height:expression(this.previoussibling.offsetheight);');
	document.write('left:expression(this.previoussibling.offsetleft);top:expression(this.previoussibling.offsettop);');
	document.write('display:expression(this.previoussibling.style.display);" scrolling="no" frameborder="no"></iframe>');
}
document.write('</div>');