if(navigator.appName == "Netscape") {
document.write('<layer id="clock"></layer><br>');
}

if (navigator.appVersion.indexOf("MSIE") != -1){
document.write('<span id="clock" style="position:relative;"></span><br>');
}

function upclock(){ 
var dte = new Date();
var hrs = dte.getHours();
var min = dte.getMinutes(); 
var sec = dte.getSeconds();
var col = ":";

if (hrs == 0) hrs=12;
if (min<=9) min="0"+min;
if (sec<=9) sec="0"+sec;

//if(navigator.appName == "Netscape") {
//document.clock.document.write("Huidige tijd "+col+" <b>"+hrs+col+min+col+sec+"</b>");
//document.clock.document.close();
//}

if (navigator.appVersion.indexOf("MSIE") != -1){
clock.innerHTML = "Huidige tijd "+col+" <b>"+hrs+col+min+col+sec+"</b>";
}
} 

setInterval("upclock()",1000);