var last_visible = false;
var is_field1 = false;
var is_field2 = false;

function submenu( answer_id ) {
	var answer_ref = document.getElementById( answer_id );
	if( answer_ref ) {
		if( last_visible ) {
			last_visible.style.display = 'none';
		}
		if( ( answer_ref.style.display == 'none' ) ) {
			if ( last_visible == answer_ref ) {
				last_visible = false;
			} else {
				answer_ref.style.display = 'block';
				last_visible = answer_ref;
			}
		}
	}
}

function getCheckedValue(radioObj) {
	if(!radioObj)
		return "";
	var radioLength = radioObj.length;
	if(radioLength == undefined)
		if(radioObj.checked)
			return radioObj.value;
		else
			return "";
	for(var i = 0; i < radioLength; i++) {
		if(radioObj[i].checked) {
			return radioObj[i].value;
		}
	}
	return "";
}

function doChange(radioObj, id ) {
	
	var myHimp = getCheckedValue(radioObj);
	
	if( myHimp == 'taip' ) {
		document.getElementById( id ).readOnly = false;
	} else {
		document.getElementById( id ).value = '';
		document.getElementById( id ).readOnly = true;
	}
	
	return "";

}