关于在时钟输出web应用程序中构建时钟的任何指针

I am trying to build a clock in clock out web app, which saves time to the database, but since i am new to php js, I just need pointers or the right direction. Reading material or something like that would be helpful too. I tried google but didnt find what i was looking for. Thanks for the help.

Since you haven't explain where you are stuck or what you have achieved so far, I cannot understand what you are looking for; Anyway i just put as an example, How to display a Clock using JavaScript. This gets time from the client computer and displays it.

<html>
<head>
<title>Clock</title>

<script type="text/javascript">
function showtime(){
    if (!document.all & !document.getElementById)
    return
    thelement=document.getElementById? document.getElementById("DigitalClock"): document.all.DigitalClock
    var Digital=new Date()
    var hours=Digital.getHours()
    var minutes=Digital.getMinutes()
    var seconds=Digital.getSeconds()
    var dn="PM"
    if (hours<12)
    dn="AM"
    if (hours>12)
    hours=hours-12
    if (hours==0)
    hours=12
    if (minutes<=9)
    minutes="0"+minutes
    if (seconds<=9)
    seconds="0"+seconds
    var ctime=hours+":"+minutes+":"+seconds+" "+dn
    thelement.innerHTML= ctime
    setTimeout("showtime()",1000)
}
window.onload=showtime

var activeElemId;
function activateItem(elemId) {
     document.getElementById(elemId).className="current";
     if(null!=activeElemId) {
       document.getElementById(activeElemId).className="";
     }
     activeElemId=elemId;
}
</script>

</head>
<body>
Digital Clock 
<div class="panel-body" id="DigitalClock" style="font-size:25px;"></div>
</body>
</html>