// cross-browser event handling for IE5+, NS6+ and Mozilla/Gecko
//  by Scott Andrew
function addEvent( elm, evType, fn, useCapture )
{
	if ( elm.addEventListener )
	{
		elm.addEventListener( evType, fn, useCapture );
		return true;
	}
	else if ( elm.attachEvent )
	{
		var r = elm.attachEvent( 'on'+evType, fn );
		return r;
	}
	else
	{
		elm[ 'on'+evType ] = fn;
	}
}