php随笔6-thinkphp OA系统 JS 实时显示当前时间

// JavaScript Document
function showtime()
{
    var today,hour,second,minute,year,month,date;
    var strDate ;
    today=new Date();
    var monthname=new Array("January","February","March","April","May","June","July","August","September","October","November","December");
    var n_day = today.getDay();
    switch (n_day)
    {
        case 0:{
          strDate = "星期天"
        }break;
        case 1:{
          strDate = "星期一"
        }break;
        case 2:{
          strDate ="星期二"
        }break;
        case 3:{
          strDate = "星期三"
        }break;
        case 4:{
          strDate = "星期四"
        }break;
        case 5:{
          strDate = "星期五"
        }break;
        case 6:{
          strDate = "星期六"
        }break;
        case 7:{
          strDate = ""
        }break;
    }
    hour = today.getHours();
    minute =today.getMinutes();
    second = today.getSeconds();
    document.getElementById(‘time‘).innerHTML = monthname[today.getMonth()] + " " + today.getDate() + ", " + today.getFullYear() +" "+strDate+" " + hour + ":" + minute + ":" + second; 
    setTimeout("showtime();", 1000); // 1000 ms(1 s)
}

<span id="time"></span><script language="javascript"> showtime();</script>