//系统时间
function getdate() {
    var week;
    if (new Date().getDay() == 0) week = "星期日"
    if (new Date().getDay() == 1) week = "星期一"
    if (new Date().getDay() == 2) week = "星期二"
    if (new Date().getDay() == 3) week = "星期三"
    if (new Date().getDay() == 4) week = "星期四"
    if (new Date().getDay() == 5) week = "星期五"
    if (new Date().getDay() == 6) week = "星期六"
    return getdate = "" + new Date().getYear() + "年" + (new Date().getMonth() + 1) + "月" + new Date().getDate() + "日  " + week;
}