CSS+JS打造的一款日期选择

2017-05-22 网页编程网 网页编程网

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>CSS+JS打造的一款日历小控件</title>
<style type="text/css">
*{ margin:0; padding:0;}
#box{ margin:200px auto; width:400px;}
.red{ color:red;}
.date{ cursor:pointer;}
.today{ background:#F90; font-weight:bold;cursor:pointer;}
.calendar_span{ display:inline-block; width:160px; height:20px; border:1px #ccc solid; position:relative; vertical-align:middle;}
.calendar_icon{ width:20px; height:20px; display:inline-block; background:url() center center no-repeat; position:absolute; left:140px; top:0; cursor:pointer;}
.calendar_input{ width:140px; height:20px; line-height:20px; border:0; position:absolute; left:0; top:0;}
.calendar_wrap{ position:absolute; width:220px; left:-1px; top:20px;}
.calendar_date{ text-align:center; border:1px #ccc solid; border-bottom:0;}
.calendar_date a{ display:inline-block; width:18px; height:20px; background-position:center -20px; vertical-align:middle; cursor:pointer;}
.calendar_date .closeBtn{background:url(); width:20px; height:20px; margin:-4px auto auto 15px;}
.preMonth{background:url(); margin-left:15px;}
.nextMonth{background:url();}
.calendar_select{ margin:0 10px;}
.calendar_table table{ width:100%; border-collapse:collapse;}
.calendar_table th,.calendar_table td{ width:30px; height:20px; border:1px #ccc solid; text-align:center;}
.calendar_table tbody{ font-family:Georgia, "Times New Roman", Times, serif;}
</style>
</head>
<body>
<div id="box">
<span>日期:</span><span><input type="text" id="calendar" class="calendar_input" readonly="readonly" /></span>
</div>
<script type="text/javascript">
var doc=document;
function $(element){
return 	typeof element=="string"?doc.getElementById(element):element;
}
function $$(className){
var _tag=null,_class=[];
var tag=doc.getElementsByTagName('*');
for(var i=0,len=tag.length;i<len;i++){
_tag=tag[i];
if(_tag.className==className){
_class.push(_tag);
}
}
if(_class.length==1){
return _class[0]
}else{
return _class;
}
}
function Calendar(){
//input元素对象
this.input=$(arguments[0]);
this.init.apply(this,arguments);
}
Calendar.prototype={
init:function(input,startY,endY){
var div=this._createCalendar();
this._initCalendarStyle(input,div);
this._finishCalendarStruct(startY,endY);
this._showCalendar(input,div);
this._setTodayDate(input);
this._selectChange();
this._clickBtn(startY,endY);
this._setInputValue(input);
this._closeCalendar();
},
//取日期值,reutrn{string} 例20130101
getValue:function(){
var input=this.input;
var value=input.value.replace(/-/gi,'');
return value;
},
//设置默认显示时间 value{string} 例:setValue('2019-01-01');
setValue:function(value){
var input=this.input;
var selectY=$$('selectYear'),selectM=$$('selectMonth')
var year=parseInt(value);
var month=parseInt(value.substring(5,7))-1;
var date=parseInt(value.substring(9,11));
this._setSelectValue(selectM,month);
this._setSelectValue(selectY,year);
this._setCalendar(year,month);
input.value=value;
},
//初始化日历样式
_initCalendarStyle:function(input,calendarDiv){
var input=$(input);
var inputP=input.parentNode;
inputP.className="calendar_span";
var span=this.create('span');
span.className="calendar_icon";
inputP.appendChild(span);
inputP.appendChild(calendarDiv);
},
//return:日历div
_createCalendar:function(){
var wrapDiv='';
var div=this.create('div');
div.className="calendar_wrap";
div.style.display="none";
wrapDiv+='<div class="calendar_date">';
wrapDiv+='<a class="preMonth" title="上一月"></a>';
wrapDiv+='<span class="calendar_select"><select class="selectYear"></select><select class="selectMonth"></select></span>';
wrapDiv+='<a class="nextMonth" title="下一月"></a>';
wrapDiv+='<a class="closeBtn" title="关闭"></a>';
wrapDiv+='</div>';
wrapDiv+='<div class="calendar_table"></div>';
div.innerHTML=wrapDiv;
return div;
},
//生成日历主体
_finishCalendarStruct:function(startY,endY){
var date=new Date(),_this=this;
var selectY=$$('selectYear'),selectM=$$('selectMonth'),calendarTable=$$('calendar_table');
if(!endY){
endY=date.getFullYear();
}
//生成下拉菜单
for(var i=startY;i<=endY;i++){
var _option=_this.create('option');
selectY.appendChild(_option);
_option.value=i;
_option.innerHTML=i;
}
for(var j=0;j<12;j++){
var _option2=_this.create('option');
selectM.appendChild(_option2);
_option2.value=j;
_option2.innerHTML=j+1+"月";
}
//生成日历table
var cTable='<table><thead><tr>';
cTable+='<th class="red">日</th><th>一</th> <th>二</th><th>三</ht><th>四</th><th>五</th><th class="red">六</th>';
cTable+='</tr></thead>';
cTable+='<tbody><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr>';
cTable+='<tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr>';
cTable+='<tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr>';
cTable+='<tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr>';
cTable+='<tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr>';
cTable+='<tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr>';
cTable+='</tbody></table>';
calendarTable.innerHTML=cTable;
},
//鼠标移入移出日期
_mouseOn:function(obj){
obj.onmouseover=function(){
if(this.innerHTML){
this.style.background="#bbb";
}
}
obj.onmouseout=function(){
this.style.	background="";
}
},
//获取下拉菜单的默认值
_getSelectValue:function(selectObj){
var selectList=selectObj.getElementsByTagName('option');
for(var i=0,len=selectList.length;i<len;i++){
var _option=selectList[i];
if(_option.selected){
return parseInt(_option.value);
}
}
},
//设置下拉菜单默认值
_setSelectValue:function(selectObj,value){
var selectList=selectObj.getElementsByTagName('option');
for(var i=0,len=selectList.length;i<len;i++){
var _option=selectList[i];
if(parseInt(_option.value)==value){
_option.selected=true;
break;
}
}
},
//显示隐藏日历
_showCalendar:function(input,element){
var _this=this;
document.onclick=function(event){
var e=event||window.event;
var t=e.target||e.srcElement;
if(t.className=='calendar_icon'||t.className=='calendar_input'){
if(element.style.display=="none"){
element.style.display="block";
_this._resizeCalendar(input,element);
}else{
element.style.display="none";
}
}
}
},
//调整日历位置，向下显示不全则向上显示，否则向下显示
_resizeCalendar:function(input,calendarDiv){
var input=$(input);
var winH=document.documentElement.clientHeight;
var _offset=this.offset(input);
var top=_offset.top;
var bottom=winH-top+input.offsetHeight;
if(bottom<calendarDiv.offsetHeight){
calendarDiv.style.top=(-calendarDiv.offsetHeight)+"px";
}else{
calendarDiv.style.top=(input.offsetHeight)+"px";
}
},
//设置今日时间
_setTodayDate:function(input){
var _this=this,input=$(input);
var selectY=$$('selectYear'),selectM=$$('selectMonth'),calendarTable=$$('calendar_table');
var table=calendarTable.getElementsByTagName('table')[0];
var date=new Date();
var year=date.getFullYear(),month=date.getMonth(),_date=date.getDate(),day=date.getDay();
var _month=month+1;
_month<10?_month="0"+_month:_month;
_date<10?_date="0"+_date:_date;
input.value=year+"-"+_month+"-"+_date;
_this._setSelectValue(selectM,month);
_this._setSelectValue(selectY,year);
this._setCalendar(year,month);
},
//接受两个参数:年和月，显示出year年month月的日历
_setCalendar:function(year,month){
var date=new Date();
var _year=date.getFullYear();
var _month=date.getMonth();
var _date=date.getDate();
date.setYear(year);
date.setMonth(month);
date.setDate(1);
var day=date.getDay();
var _this=this;
var monthDays=this._getMonthDays(year,month);
var table=$$('calendar_table').getElementsByTagName('table')[0];
var td=table.getElementsByTagName('td');
for(var k=0;k<td.length;k++){
td[k].innerHTML="";
td[k].className="";
}
for(var i=day,len=td.length;i<len;i++){
var _td=td[i];
var j=i-day+1;
_td.innerHTML=j;
_td.className="date";
if(_year==year&&_month==month&&_date==j){
_td.className="today";
}else{
_this._mouseOn(_td);
}
if(j>=monthDays){
break;
}
}
},
//下拉菜单选择日期
_selectChange:function(){
var _this=this;
var selectY=$$('selectYear'),selectM=$$('selectMonth')
selectY.onchange=function(){
var year=_this._getSelectValue(selectY);
var month=_this._getSelectValue(selectM);
_this._setCalendar(year,month);
}
selectM.onchange=function(){
var year=_this._getSelectValue(selectY);
var month=_this._getSelectValue(selectM);;
_this._setCalendar(year,month);
}
},
//前一月、下一月单击事件
_clickBtn:function(startYear,endYear){
var _this=this,year=0,pre=$$('preMonth'),next=$$('nextMonth');
var selectY=$$('selectYear'),selectM=$$('selectMonth')
pre.onclick=function(){
year=_this._getSelectValue(selectY);
var month=_this._getSelectValue(selectM)-1;
if(month<0){
month=11;
year--;
}
if(!isYearOver(year)){
return;
}
_this._setSelectValue(selectM,month);
_this._setSelectValue(selectY,year);
_this._setCalendar(year,month);
}
next.onclick=function(){
year=_this._getSelectValue(selectY);
var month=_this._getSelectValue(selectM)+1;
if(month>11){
month=0;
year++;
}
if(!isYearOver(year)){
return;
}
_this._setSelectValue(selectM,month);
_this._setSelectValue(selectY,year);
_this._setCalendar(year,month);
}
function isYearOver(year){
var date=new Date();
var _endYear=endYear?endYear:date.getFullYear();
if(year>_endYear||year<startYear){
alert("超出日期范围");
return false;;
}else{
return true;
}
}
},
//点击日期将日期显示到input标签
_setInputValue:function(input){
var input=$(input),_this=this;
var table=$$('calendar_table').getElementsByTagName('table')[0];
var selectY=$$('selectYear'),selectM=$$('selectMonth')
table.onclick=function(event){
var e=event||window.event;
var t=e.target||e.srcElement;
if(t.nodeName.toLowerCase()=='td'&&t.innerHTML){
var year=_this._getSelectValue(selectY);
var month=_this._getSelectValue(selectM)+1;
var date=t.innerHTML;
month<10?month="0"+month:month;
date.length==1?date="0"+date:date;
input.value=year+"-"+month+"-"+date;
$$('calendar_wrap').style.display="none";
if(document.all){
e.cancleBubble=true;
}else{
e.stopPropagation();
}
}
}
},
//日历关闭按钮
_closeCalendar:function(){
$$('closeBtn').onclick=function(){
$$('calendar_wrap').style.display="none";
}
},
//取style值,obj{string|object} _style{string},样式名称
getStyle:function(obj,_style){
var node=typeof obj=="string"?$(obj):obj;
return doc.all?node.currentStyle[_style]:window.getComputedStyle(node,null)[_style];
},
//元素在页面的偏移量:return{object} object.left 左偏移 object.right 右偏移
offset:function(obj){
var _offset={};
var _scroll={};
if(document.documentElement.scrollTop||document.documentElement.scrollLeft){
_scroll.left=document.documentElement.scrollLeft;
_scroll.top=document.documentElement.scrollTop;
}else{
_scroll.left=document.body.scrollLeft;
_scroll.top=document.body.scrollTop;
}
var node=typeof obj=="string"?$(obj):obj;
var left=node.offsetLeft,top=node.offsetTop;
for(var o=node;o.parentNode;o=o.parentNode){
var _position=this.getStyle(o.parentNode,'position');
if(_position!="static"){
left+=o.parentNode.offsetLeft;
top+=o.parentNode.offsetTop;
}
if(o.parentNode.nodeName.toLowerCase()=='html'){
break;
}
}
_offset.left=left-_scroll.left;
_offset.top=top-_scroll.top;
return _offset;
},
//返回某个月的天数
_getMonthDays:function(year,month){
var monthAry=[31,28,31,30,31,30,31,31,30,31,30,31];
if(year%400==0){
monthAry[1]=29;
}else{
if(year%4==0&&year%100!=0){
monthAry[1]=29;
}
}
return monthAry[month];
},
create:function(tagName){
return document.createElement(tagName);
}
}
var calendar=new Calendar("calendar",2000);
</script>
</body>
</html>

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