function fsPopup(URL) {
window.open('/fullsize.php?fn='+URL, 'imagething', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0');
}

function chImg(preview, fullsize)	{
	var tmp = new Image();
	tmp.src = preview;
// we doen vooralsnog geen thumb g, maar volledige grootte, dus er is ook geen a href met js fspopup
//	document.getElementById('pref').href='javascript:fsPopup(\''+fullsize+'\');';
//	document.getElementById('pref2').href='javascript:fsPopup(\''+fullsize+'\');';
	document.getElementById('pimg').src=tmp.src;
}


function checkemail(strfield) {
	
	var bRegExpCapable = true;
	var regex= /^[\w_-]+(\.[\w_-]+)*@((\w[\w_-]+\.)*\w[\w_-]{0,66})\.([a-z]{2,6}(\.[a-z]{2})?)$/i;
	if ((!strfield.value == '')&&(bRegExpCapable)) {
		if (!regex.test(strfield.value)) {
			var strmessage = 'email-address not valid: "' + strfield.value + '"';
				strmessage += '\nCheck it please';
			//strmessage += '\n\nIf you have no email-address, please leave that field empty.';
			strmessage += '\n\nIf you think you should not get this message, ';
			strmessage += 'please contact the webmaster: webmaster@jwboon.nl';
			alert(strmessage);
			strfield.focus();
			return false;
		} else {
			return true;
		}
	} else {
		return true;
	}
}