【转载】日历

var Calendar = function(){
    var self = this;
    
    self.box = document.createElement("div");
    self.head = document.createElement("div");
        self.datePlace;
    self.body = document.createElement("div");
        self.selectDay;
    self.foot = document.createElement("div");
        self.timePlace;
    
    self.dateInfo = {
        "now" : new Date(),
        "getDate" : function(d){
            d = d || self.dateInfo["now"];
            return d.getFullYear() + "-" + (d.getMonth()+1) + "-" + d.getDate();
        },
        "getTime" : function(d){
            d = d || self.dateInfo["now"];
            return d.getHours() + ":" + d.getMinutes() + ":" + d.getSeconds();
        },
        "getSelectTime" : function(d){
            d = d || self.dateInfo["now"];
            return d.getFullYear() + "-" + (d.getMonth()+1) + "-" + self.dateInfo.selectDay + 
            " " + d.getHours() + ":" + d.getMinutes() + ":" + d.getSeconds();
        },
        "getDaysCount" : function(d){
            d = d || self.dateInfo["now"];
            return (new Date(d.getFullYear(),d.getMonth()+1,0)).getDate();
        },
        "weekOfFirstDay" : function(d){
            d = d || self.dateInfo["now"];
            return (new Date(d.getFullYear(),d.getMonth(),1)).getDay();
        }
    };
    self.dateInfo.selectDay = self.dateInfo["now"].getDate();
    
    this.init();
};
Calendar.prototype = {
    init : function(){
        this.initDom();
    },
    initDom : function(){
        var self = this;
        //head
        var o = {"preYear":"<<","preMonth":"<","date":self.dateInfo["getDate"](),"nextMonth":">","nextYear":">>"};
        for(var i in o){
            var __ = o[i], tag = document.createElement("span");
            tag.innerHTML = __.toString();
            i!="date" && (tag.onclick = (function(fn){
                                            return function(){fn.call(self);}
                                        })(self[i])
                         );
            i=="date" && (tag.className = "dateShow",self.datePlace = tag);
            
            self.head.appendChild(tag);
        }
        self.head.className = "cal-head";
        
        //body
        self.buildBody();
        self.body.className = "cal-body";
        
        //foot
        self.timePlace = document.createElement("span");
        
        var dInfo = self.dateInfo;
        var Valid = function(num,max){
            num = /^\d+$/.test(num) ? num : -1;
            if(num<0 || num>max){
                return false;    
            }
            return true;
        };
        
        var times = {"hour":["getHours","setHours"],"minutes":["getMinutes","setMinutes"],"seconds":["getSeconds","setSeconds"]};
        for(var i in times){
            var t = document.createElement("span");
            var tInput = document.createElement("input");
            t.innerHTML = tInput.value = dInfo["now"][times[i][0]]();    
            
            tInput.style.display = "none";
            t.onclick = (function(tIpt){
                return function(){
                    this.style.display = "none";
                    tIpt.style.display = "inline-block";
                    tIpt.select();
                }
            })(tInput);
            tInput.onblur = (function(t,setFn){
                return function(){
                    this.style.display = "none";
                    if(Valid(this.value,(setFn=="setHours"?23:59))){
                        t.innerHTML = this.value;
                        dInfo["now"][setFn](parseInt(this.value));
                    }
                    t.style.display = "inline-block";
                }
            })(t,times[i][1]);
            
            self.timePlace.appendChild(t);
            self.timePlace.appendChild(tInput);
            
            if(i!="seconds"){
                var sp = document.createElement("span");
                sp.innerHTML = ":";
                self.timePlace.appendChild(sp);
            }
        }
        self.timePlace.className = "timeShow";
        
        var okBtn = document.createElement("span");
        okBtn.innerHTML = "Ok";
        okBtn.className = "okBtn";
        okBtn.onclick = function(){
            alert(dInfo["getSelectTime"]());
        };
        
        self.foot.appendChild(self.timePlace);
        self.foot.appendChild(okBtn);
        self.foot.className = "cal-foot";
        
        //relation
        this.box.appendChild(self.head);
        this.box.appendChild(self.body);
        this.box.appendChild(self.foot);
        
        this.box.className = "cal-box";
        document.body.appendChild(this.box);
    },
    buildBody : function(){
        var self = this,dInfo = self.dateInfo, week = dInfo["weekOfFirstDay"](),days = dInfo["getDaysCount"](),day = dInfo["now"].getDate();
        var cDay = function(inner,ev){
            var tag = document.createElement("span");
            tag.innerHTML = inner;
            
            ev && (tag.onclick = function(){
                self.selectDay.className = self.selectDay.className.replace(" selectDay","");
                self.selectDay = this;
                self.selectDay.className = self.selectDay.className + " selectDay";
                
                self.dateInfo.selectDay = inner;
            });
            
            return tag;
        };
        var domPgm = document.createDocumentFragment();
        //weedInfo
        var weeks = ["天","一","二","三","四","五","六"];
        for(var i=0;i<weeks.length;i++){
            domPgm.appendChild(cDay(weeks[i]));
        }
        
        //上个月的补白
        for(var i=0;i<week;i++){
            domPgm.appendChild(cDay(""));
        }
        //本月信息
        parseInt(self.dateInfo.selectDay) > days && (self.dateInfo.selectDay = days);
        for(var i=1;i<=days;i++){
            var tag = cDay(i,true);
            self.dateInfo.selectDay == i && (self.selectDay = tag,tag.className=" selectDay");
            i===day && (tag.className=tag.className+" nowDay");
            domPgm.appendChild(tag);
        }
        //下个月的补白....
        
        self.body.innerHTML = "";
        self.body.appendChild(domPgm);
        
    },
    dateShow : function(){
        this.datePlace.innerHTML = this.dateInfo["getDate"]();
    },
    updateUI : function(){
        this.dateShow();
        this.buildBody();
    },
    preYear : function(){
        this.dateInfo["now"].setYear(this.dateInfo["now"].getFullYear()-1);
        this.updateUI();
    },
    preMonth : function(){
        var dInfo = this.dateInfo,m = dInfo["now"].getMonth();
        --m;
        m<0 && (m = 11,dInfo["now"].setYear(this.dateInfo["now"].getFullYear()-1)); 
        dInfo["now"].setMonth(m);
        this.updateUI();
    },
    nextMonth :　function(){
        var dInfo = this.dateInfo,m = dInfo["now"].getMonth();
        ++m;
        m>11 && (m = 0,dInfo["now"].setYear(this.dateInfo["now"].getFullYear()+1));
        dInfo["now"].setMonth(m);
        this.updateUI();
    },
    nextYear : function(){
        this.dateInfo["now"].setYear(this.dateInfo["now"].getFullYear()+1);
        this.updateUI();
    }
};

.cal-box{
    width:210px;
    font-family:"Courier New", Courier, monospace;
    font-size:14px;
}
.cal-box span{
    display:inline-block;
    text-align:center;
}

.cal-head{
    background-color:#FC3;
}
.cal-head span{
    width:20px;
    font-weight:bold;
    color:#69C;
    text-decoration:underline;
    cursor:pointer;
}
.cal-head .dateShow{
    width:130px;
    text-decoration:none;
}

.cal-foot{
    background-color:#FC3;
}
.cal-foot .timeShow{
    width:160px;
    text-align:left;
}
.cal-foot .timeShow input{
    width:24px;
    height:12px;
    font-size:12px;
}
.cal-foot .okBtn{
    width:50px;
    background-color:#CCC;
    cursor:pointer;
}

.cal-body{
    background-color:#9CF;
}
.cal-body span{
    display:inline-block;
    width:30px;
    text-align:center;
    cursor:pointer;
}
.cal-body .nowDay{
    background-color:#F00;
}
.cal-body .selectDay{
    text-decoration:underline;
}