var timerID = null
var timerRunning = false

function stopclock(){
    if(timerRunning)
        clearTimeout(timerID)
    timerRunning = false
}

function startclock(){
    stopclock()
    showtime()
}

function showtime(){
    var timecontent = document.getElementById("tiden");
	var now = new Date()
    var hours = now.getHours()
    var minutes = now.getMinutes()
    var seconds = now.getSeconds()
    var timeValue = "" + ((hours < 10) ? "0" : "") + hours
    timeValue  += ((minutes < 10) ? ":0" : ":") + minutes
    timeValue  += ((seconds < 10) ? ":0" : ":") + seconds
    timecontent.innerHTML = timeValue;
    
    timerID = setTimeout("showtime()",1000)
    timerRunning = true
}