Why this clock isn'

Why this clock isn't good only with NE 4

this code is from Netscapes JavaScript documentation at www.netscape.com

function showtime () {
var now = new Date();
var hours = now.getHours();
var minutes = now.getMinutes();
var seconds = now.getSeconds()
var timeValue = " " + ((hours >23) ? hours -23 :hours)
timeValue += ((minutes < 10) ? "h0" : "h") + minutes
document.clock.face.value = timeValue;
timerID = setTimeout("showtime()",1000);
timerRunning = true;
}

this code works well only with netscape 4

unction showtime () {
var now = new Date();
var hours = now.getHours();
var minutes = now.getMinutes();
var seconds = now.getSeconds()
hours = ((hours>23) ? hours -23 :hours);
timeValue = ((hours > 10) ? hours: " " + hours);
timeValue += ((minutes < 10) ? "h0" : "h") + minutes
document.clock.face.value = timeValue;
timerID = setTimeout("showtime()",1000);
timerRunning = true;
}

this code works well with all browsers

function showtime () {
var now = new Date();
var hours = now.getHours();
var minutes = now.getMinutes();
var seconds = now.getSeconds()
hours = ((hours>23) ? hours -23 :hours);
timeValue = ((hours > 10) ? hours: "0 " + hours);
timeValue += ((minutes < 10) ? "h0" : "h") + minutes
document.clock.face.value = timeValue;
timerID = setTimeout("showtime()",1000);
timerRunning = true;
}

It is because netscape 4 include first space of the string for centering (it's not consonant with HTML)