function changePers(pid)
	{
		a 	= document.getElementById('prog'+pid);
		input 	= document.getElementById('input'+pid);

		if (a.className == 'p')
		{
			a.className = 'pCheck';
			input.checked = true;
		}
		else
		{
			a.className = 'p';
			input.checked = false;
		}
	}

	function removePers(pid)
	{
		a 	= document.getElementById('prog'+pid);
		input 	= document.getElementById('input'+pid);

		if (a.className == 'p')
		{
			a.className = 'pCheck';
			input.checked = true;
		}
		else
		{
			a.className = 'p';
			input.checked = false;
		}
	}

	function checkIE()
	{
		isMac = (navigator.appVersion.indexOf("Mac")!=-1) ? true : false;
		IEmac = ((document.all)&&(isMac)) ? true : false;
		IE4plus = (document.all) ? true : false;
		IE4 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 4.")!=-1)) ? true : false;
		IE5 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 5.")!=-1)) ? true : false;
		IE6 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 6.")!=-1)) ? true : false;

		if (IEmac || IE4plus || IE4 || IE4 || IE5 || IE6)
		{
			return true;
		}
		else
		{
			return false;
		}
	}

	function checkint(keycode)
	{
		if (checkIE())
		{
			keycode = window.event.keyCode;
		}

		if ((keycode < 33) || ((keycode < 58) && (keycode > 47)))
		{
			return true;
		}
		else
		{
			return false;
		}
	}

	function checkalfanum(keycode, leestekens)
	{

		if (checkIE())
		{
			keycode = window.event.keyCode;
		}
		
		if (((keycode >= 65) && (keycode <= 90)) || ((keycode >= 97) && (keycode <= 122)) || ((keycode >= 44) && (keycode <= 47) && (leestekens == true)) || (keycode < 33))
		{
			return true;
		}
		else
		{
			return false;
		}
	}

	function makeUpper(element)
	{
		element.value = element.value.toUpperCase();
	}

	function switchpostcode(element, elementnaam, formuliernaam)
	{
		if (element.value.length == 4)
		{
			document.forms[formuliernaam].elements[elementnaam+"_letters"].focus();
		}
	}

	function switchLive(herhaling)
	{
		if (herhaling.checked == true)
		{
			document.forms.zoekuitgebreid.live.checked = false;
		}
	}

        function switchHerhaling(live)
        {
                if (live.checked == true)
                {
                        document.forms.zoekuitgebreid.herhaling.checked = false;
                }
        }

	function submitForm(event, form)
	{
		if (event.keyCode == 13)
		{
			form.submit();
		}
	}

	function rand ( n )
	{
		return ( Math.floor ( Math.random ( ) * n + 1 ) );
	}

	function initNuZenders()
	{
                if (document.getElementById('zender_24')){aZenders[aZenders.length] = document.getElementById('zender_24');}
                if (document.getElementById('zender_39')){aZenders[aZenders.length] = document.getElementById('zender_39');}
                if (document.getElementById('zender_107')){aZenders[aZenders.length] = document.getElementById('zender_107');}
                if (document.getElementById('zender_99')){aZenders[aZenders.length] = document.getElementById('zender_99');}

		iCurrent = rand(4)-1;

		for (i = 0; i < aZenders.length; i++)
		{
			if (i != iCurrent)
			{
				aZenders[i].style.display = 'none';
			}
		}
	}

	function changeNuZender()
	{

		setTimeout("changeNuZender()", 120000);

		for (i = 0; i < aZenders.length; i++)
		{
			aZenders[i].style.display = 'none';
		}

		aZenders[iCurrent].style.display = 'block';

		iCurrent = iCurrent + 1;

		if (iCurrent >= aZenders.length)
		{
			iCurrent = 0;
		}
	}