var W3CDOM = (document.getElementsByTagName && document.createElement);

function writeError(obj,message) {
	validForm = false;
	if (obj.hasError) return;
	if (W3CDOM) {
		obj.onchange = removeError;
		var div = document.createElement('div');
		div.className = 'error';
		div.appendChild(document.createTextNode(message));
		obj.parentNode.appendChild(div);
		obj.hasError = div;
	}
	else {
		errorstring += obj.name + ': ' + message + '\n';
		obj.hasError = true;
	}
	if (!firstError)
		firstError = obj;
}

function removeError() {
	this.parentNode.removeChild(this.hasError);
	this.hasError = null;
	this.onchange = null;
}