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纯js实现日期选择效果

阅读：3878 输入：2017-05-03 14:45:26

<html>
<head>
<title>不错的日期选择效果</title>
<script type="text/javascript">
function HS_DateAdd(interval,number,date){
	number = parseInt(number);
	if (typeof(date)=="string"){var date = new Date(date.split("-")[0],date.split("-")[1],date.split("-")[2])}
	if (typeof(date)=="object"){var date = date}
	switch(interval){
	case "y":return new Date(date.getFullYear()+number,date.getMonth(),date.getDate()); break;
	case "m":return new Date(date.getFullYear(),date.getMonth()+number,checkDate(date.getFullYear(),date.getMonth()+number,date.getDate())); break;
	case "d":return new Date(date.getFullYear(),date.getMonth(),date.getDate()+number); break;
	case "w":return new Date(date.getFullYear(),date.getMonth(),7*number+date.getDate()); break;
	}
}
function checkDate(year,month,date){
	var enddate = ["31","28","31","30","31","30","31","31","30","31","30","31"];
	var returnDate = "";
	if (year%4==0){enddate[1]="29"}
	if (date>enddate[month]){returnDate = enddate[month]}else{returnDate = date}
	return returnDate;
}

var now;
	if (typeof(arguments[0])=="string"){
		selectDate = arguments[0].split("-");
		var year = selectDate[0];
		var month = parseInt(selectDate[1])-1+"";
		var date = selectDate[2];
		now = new Date(year,month,date);
	}else if (typeof(arguments[0])=="object"){
		now = arguments[0];
	}
	var lastMonthEndDate = HS_DateAdd("d","-1",now.getFullYear()+"-"+now.getMonth()+"-01").getDate();
	var lastMonthDate = WeekDay(now.getFullYear()+"-"+now.getMonth()+"-01");
	var thisMonthLastDate = HS_DateAdd("d","-1",now.getFullYear()+"-"+(parseInt(now.getMonth())+1).toString()+"-01");
	var thisMonthEndDate = thisMonthLastDate.getDate();
	var thisMonthEndDay = thisMonthLastDate.getDay();
	var todayObj = new Date();
	today = todayObj.getFullYear()+"-"+todayObj.getMonth()+"-"+todayObj.getDate();
	
	for (i=0; i<lastMonthDate; i++){  // Last Month's Date
		lis = "<li class='lastMonthDate'>"+lastMonthEndDate+"</li>" + lis;
		lastMonthEndDate--;
	}
	for (i=1; i<=thisMonthEndDate; i++){ // Current Month's Date

if(today == now.getFullYear()+"-"+now.getMonth()+"-"+i){
			var todayString = now.getFullYear()+"-"+(parseInt(now.getMonth())+1).toString()+"-"+i;
			lis += "<li><a href=javascript:void(0) class='today' onclick='_selectThisDay(this)' title='"+now.getFullYear()+"-"+(parseInt(now.getMonth())+1)+"-"+i+"'>"+i+"</a></li>";
		}else{
			lis += "<li><a href=javascript:void(0) onclick='_selectThisDay(this)' title='"+now.getFullYear()+"-"+(parseInt(now.getMonth())+1)+"-"+i+"'>"+i+"</a></li>";
		}
		
	}
	var j=1;
	for (i=thisMonthEndDay; i<6; i++){  // Next Month's Date
		lis += "<li class='nextMonthDate'>"+j+"</li>";
		j++;
	}
	lis += style;

var CalenderTitle = "<a href='javascript:void(0)' class='NextMonth' onclick=HS_calender(HS_DateAdd('m',1,'"+now.getFullYear()+"-"+now.getMonth()+"-"+now.getDate()+"'),this) title='Next Month'>»</a>";
	CalenderTitle += "<a href='javascript:void(0)' class='LastMonth' onclick=HS_calender(HS_DateAdd('m',-1,'"+now.getFullYear()+"-"+now.getMonth()+"-"+now.getDate()+"'),this) title='Previous Month'>«</a>";
	CalenderTitle += "<span class='selectThisYear'><a href='javascript:void(0)' onclick='CalenderselectYear(this)' title='Click here to select other year' >"+now.getFullYear()+"</a></span>年<span class='selectThisMonth'><a href='javascript:void(0)' onclick='CalenderselectMonth(this)' title='Click here to select other month'>"+(parseInt(now.getMonth())+1).toString()+"</a></span>月";

if (arguments.length>1){
		arguments[1].parentNode.parentNode.getElementsByTagName("ul")[1].innerHTML = lis;
		arguments[1].parentNode.innerHTML = CalenderTitle;

}else{
		var CalenderBox = style+"<div class='calender'><div class='calenderTitle'>"+CalenderTitle+"</div><div class='calenderBody'><ul class='day'><li>日</li><li>一</li><li>二</li><li>三</li><li>四</li><li>五</li><li>六</li></ul><ul class='date' id='thisMonthDate'>"+lis+"</ul></div><div class='calenderBottom'><a href='javascript:void(0)' class='closeCalender' onclick='closeCalender(this)'>×</a><span><span><a href=javascript:void(0) onclick='_selectThisDay(this)' title='"+todayString+"'>Today</a></span></span></div></div>";
		return CalenderBox;
	}
}
function _selectThisDay(d){
	var boxObj = d.parentNode.parentNode.parentNode.parentNode.parentNode;
		boxObj.targetObj.value = d.title;
		boxObj.parentNode.removeChild(boxObj);
}
function closeCalender(d){
	var boxObj = d.parentNode.parentNode.parentNode;
		boxObj.parentNode.removeChild(boxObj);
}

function selectThisYear(obj){
	HS_calender(obj.value+"-"+obj.parentNode.parentNode.getElementsByTagName("span")[1].getElementsByTagName("a")[0].innerHTML+"-1",obj.parentNode);
}

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