js日历

/**
* Created by kylinhao on 2015/6.
*/
Date.prototype.isLeapYear = function () {
return (0 == this.getYear() % 4 && ((this.getYear() % 100 != 0) || (this.getYear() % 400 == 0)));
}

Date.prototype.format = function (format) {
var o = {
"M+": this.getMonth() + 1, //month
"d+": this.getDate(), //day
"h+": this.getHours(), //hour
"m+": this.getMinutes(), //minute
"s+": this.getSeconds(), //second
"q+": Math.floor((this.getMonth() + 3) / 3), //quarter
"S": this.getMilliseconds() //millisecond
}
if (/(y+)/.test(format)) format = format.replace(RegExp.$1,
(this.getFullYear() + "").substr(4 - RegExp.$1.length));
for (var k in o)if (new RegExp("(" + k + ")").test(format))
format = format.replace(RegExp.$1,
RegExp.$1.length == 1 ? o[k] :
("00" + o[k]).substr(("" + o[k]).length));
return format;
}

function calendar() {
var arr = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
var now = new Date();
//当天是第几天
var day = now.getDate();
// 获取当天是周几
var week = now.getDay();
var month = now.getMonth();
if (Date.prototype.isLeapYear != 0)
arr[2] = 29;
r = day % 7;
if (r == 0)
r = 7;
// 得到星期一是周几
var week1 = (week + 7 - (r - 1)) % 7;
var table = document.getElementById("calendar-table");
var name = document.getElementById("calendar-name");
var time = document.getElementById("calendar-time");
var newRow = table.insertRow(table.rows.length);
for (var j = 0; j < week1; j++) {
var cell = newRow.insertCell(newRow.cells.length);
cell.innerHTML = ""
}
var i = 1;
while (i <= arr[month]) {
if (week1 != 7) {
var cell = newRow.insertCell(newRow.cells.length);
cell.innerHTML = i;
//cell.style.fontSize ="19px"
//cell.style.color = "gray"
if (i == day) {
cell.style.backgroundColor = "#66afe9"
cell.style.color = "white"
}
week1++;
i++;
}
else {
week1 = 0;
newRow = table.insertRow(table.rows.length);
}
}
while (week1 < 7) {
var cell = newRow.insertCell(newRow.cells.length);
cell.innerHTML = "";
week1++;
}

month = month + 1;
name.innerHTML = month + "月日历";
time.innerHTML = now.format("yyyy-MM-dd hh:mm:ss");
}