function addevent(elm, evType, fn, useCapture)
// cross-browser event handling for IE5+,  NS6 and Mozilla
// By Scott Andrew
{
	if(elm.attachEvent) {
		var r = elm.attachEvent("on"+evType, fn);
		return r;
	} else if(elm.addEventListener) {
		elm.addEventListener(evType, fn, useCapture);
		return true;
	} else {
		//alert("Handler could not be removed");
	}
}