function textCounter(field,cntfield,maxlimit){
	if (field.value.length > maxlimit)
		field.value = field.value.substring(0, maxlimit);
	else
		cntfield.value = maxlimit - field.value.length;
}

function clear_radio_buttons() {
     for (var i = 0; i < document.contact_form.bron.length; i++) {
          document.contact_form.bron[i].checked = false;
     }
}