function validate(frm){
	if(!frm.required) return true;
	var requiredFields = frm.required.value.split(/\s*,\s*/);;
	var rLen = requiredFields.length;
	if(frm.message)var message =  frm.message.value;
	if (!frm.message)message = 'De volgende velden zijn verplicht:';
	var errorFields = '';
	var firstFld = '';

	for(var i=0; i < rLen;i ++){
		var fldObj = eval('frm.' + requiredFields[i]);
		if (fldObj.value == '')errorFields += '- ' + fldObj.title + '\n';
		if(firstFld =='' && fldObj.value == '')firstFld = fldObj;
		if(fldObj.name == 'email')if(fldObj.value != '')if(!IsEmail(fldObj.value))errorFields += '- ' + fldObj.title + ' is ongeldig\n';
	}
	if(message != '') message += '\n';
	if(errorFields != ''){
		alert(message + errorFields);
		if(firstFld != '')firstFld.focus();
		return false;
	}
	return true;
}

function IsEmail(strEmail){
	var emailReg    = /^[A-Za-z0-9](([_\.\-]?[a-zA-Z0-9]+)*)@([A-Za-z0-9]+)(([\.\-]?[a-zA-Z0-9]+)*)\.([A-Za-z]{2,})$/;
	if(!strEmail.match(emailReg)){
		return false;
	}
	return true;
}