var timetype = 12;
function timing(){
   var t = new Date();
   var h = t.getHours();
   var m = t.getMinutes();
   var s = t.getSeconds();
   mstxt = ((m < 10) ? ":0" : ":") +
      m + ((s < 10) ? ":0" : ":") + s;
   document.timeform.time.value=
      (timetype==24)?(((h<10)?"0":"")+
      h+mstxt):(((h>24)?h-24:h)+mstxt+
      ((h>=12)?"":""));
      clock = setTimeout("timing()",1000);
}

function start_timing(input_timetype)
{  timetype = input_timetype;
   timing();
}

if (document.images)
	{
	but1on= new Image();
	but1on.src="images/PrinterVersieOn.gif";
	but1off= new Image();
	but1off.src="images/PrinterVersieOff.gif";
}

function aan(ButName)
{if (document.images)
	{imgOn=eval(ButName + "on.src");
	 document[ButName].src= imgOn;
	}
}

function uit(ButName)
{if (document.images)
	{imgOff=eval(ButName + "off.src");
	 document[ButName].src= imgOff;
	}
}

function newwindow(popup,w,h,scroll) { 
	var winleft = (top.screen.width - w) / 2;
	var yMax = top.screen.height/3*2;
	hoog = (h==0)? yMax:h;
	var winup = (top.screen.height - hoog) / 3;
	winProp = 'width='+w+',height='+hoog+',left='+winleft+',top='+winup+',scrollbars='+scroll+',toolbar=no,menubar=no,resizable=no'
	Win = window.open(popup, "", winProp)
}