HTML5实现签到 功能

//生成日期数据    function buildData() {        var da = {            dates: [],//日期数据，从1号开始            current: '',//当前日期            monthFirst: 1,//获取当月的1日等于星期几            month: 0,//当前月份            days: 30,//当前月份共有多少天            day: 0,//今天几号了            isSigned: false,//今天是否已经签到            signLastDays:3,//连续签到日子            signToday: function () {                this.isSigned = true;                this.dates[this.day].isSigned = true;            },        };        var ds = [];        //初始化日期数据        var dt = new Date();        da.current = dt.ToString('yyyy年M月d日');        da.monthFirst = new Date(dt.getFullYear(), dt.getMonth(), 1).getDay();        da.month = dt.getMonth() + 1;        da.days = new Date(dt.getFullYear(), parseInt(da.month), 0).getDate();//获取当前月的天数        da.day = dt.getDate();        for (var i = 1; i < da.days + 1; i++) {            var o = {                isSigned: false,//是否签到了                num: i,//日期                isToday: i == da.day,//是否今天                isPass: i < da.day,//时间已过去            };            ds[i] = o;        }        da.dates = ds;        return da;    }

 //渲染数据    function renderData(da) {        var signDays = document.getElementById('spSignDays');        signDays.innerText = da.signLastDays;        var root = document.getElementById("signTable");        root.innerHTML = '';        var tr, td;        var st = da.monthFirst;        var dates = da.dates;        var rowcount = 0;        //最多6行        for (var i = 0; i < 42; i++) {            if (i % 7 == 0) {                //如果没有日期了，中断                if (i > (st + da.days))                    break;                tr = document.createElement('tr');                tr.className = 'darkcolor trb';                root.appendChild(tr);                rowcount++;            }            //前面或后面的空白            if (i < st || !dates[i - st + 1]) {                td = document.createElement('td');                td.innerHTML = '<div class="sign-blank"><span></span></div>';                tr.appendChild(td);                continue;            }            //填充数字部分            var d = dates[i - st + 1];            td = document.createElement('td');            var tdcss = '';            if (d.isToday)                tdcss = 'sign-today';            else if (d.isPass)                tdcss = 'sign-pass';            else                tdcss = 'sign-future';            if (d.isSigned) {                tdcss = 'sign-signed ' + tdcss;                td.innerHTML = '<div class="' + tdcss + '"><span>' + d.num + '</span><svg xmlns="http://www.w3.org/2000/svg" version="1.1" class="sign-pin svg-triangle "><polygon points="0,0 35,0 0,35" /></svg></div>';            } else {                tdcss = 'sign-unsign ' + tdcss;                td.innerHTML = '<div class="' + tdcss + '"><span>' + d.num + '</span></div>';            }            tr.appendChild(td);        }        //计算是否需要添加最后一行        if ((st + da.days + 1) / 7 > rowcount)            root.appendChild(tr);    }       //构建日期数据        var da = buildData();        //渲染        renderData(da);