// Verander hier de tijd dat er refreshed moet worden ( in seconden )
var refreshinterval=600

// De refresh in de statusbalk zichtbaar ? ( yes / No )
var displaycountdown="no"

var starttime
var nowtime
var reloadseconds=0
var secondssinceloaded=0

function starttime() {
	starttime=new Date()
	starttime=starttime.getTime()
        countdown()
}

function countdown() {
	nowtime= new Date()
	nowtime=nowtime.getTime()
	secondssinceloaded=(nowtime-starttime)/1000
	reloadseconds=Math.round(refreshinterval-secondssinceloaded)
	if (refreshinterval>=secondssinceloaded) {
        var timer=setTimeout("countdown()",1000)
		if (displaycountdown=="yes") {
			window.status="Pagina vernieuwd over"+reloadseconds+ " seconden"
		}
    }
    else {
        clearTimeout(timer)
		window.location.reload(true)
    } 
}
window.onload=starttime