Ændre ur fra computerens tid til serverens tid

Jeg har følgende script som jeg gerne vil have ændret så den tager serverens tid og ikke efter computerens tid. (Serveren kører php)
var myfont_face = "Verdana";
    var myfont_size = "8";
    var myfont_color = "#000000";
    var myback_color = "";
    var mywidth = 80;
    var my12_hour = 0;

    var dn = ""; var old = "";

    if (document.all||document.getElementById) { document.write('<span id="LiveClockIE" style="width:'+mywidth+'px; background-color:'+myback_color+'"></span>'); }
    else if (document.layers) { document.write('<ilayer bgColor="'+myback_color+'" id="ClockPosNS"><layer width="'+mywidth+'" id="LiveClockNS"></layer></ilayer>'); }
    else { old = "true"; show_clock(); }

    function show_clock() {

        //show clock in NS 4
        if (document.layers)
                document.ClockPosNS.visibility="show"
        if (old == "die") { return; }

        var Digital = new Date();
        var hours = Digital.getHours();
        var minutes = Digital.getMinutes();
        var seconds = Digital.getSeconds();

        if (my12_hour) {
            dn = "AM";
            if (hours > 12) { dn = "PM"; hours = hours - 12; }
            if (hours == 0) { hours = 12; }
        } else {
            dn = "";
        }
        if (minutes <= 9) { minutes = "0"+minutes; }
        if (seconds <= 9) { seconds = "0"+seconds; }

        myclock = '';
        myclock += '<font style="color:'+myfont_color+'; font-family:'+myfont_face+'; font-size:'+myfont_size+'pt;">';
        myclock += hours+':'+minutes+':'+seconds+' '+dn;
        myclock += '</font>';

        if (old == "true") {
            document.write(myclock);
            old = "die"; return;
        }

        if (document.layers) {
            clockpos = document.ClockPosNS;
            liveclock = clockpos.document.LiveClockNS;
            liveclock.document.write(myclock);
            liveclock.document.close();
        } else if (document.all) {
            LiveClockIE.innerHTML = myclock;
        } else if (document.getElementById) {
            document.getElementById("LiveClockIE").innerHTML = myclock;
        }

        setTimeout("show_clock()",1000);
}