//http://www.biasecurities.com/blogs/jim/archive/2005/04/28/1794.aspx
function AttachEvent(elementObj, eventName, eventHandlerFunctionName)
{
	if (elementObj.addEventListener) { // Non-IE browsers
		elementObj.addEventListener(eventName, eventHandlerFunctionName, false);
	} else if (elementObj.attachEvent) { // IE 6+
		elementObj.attachEvent('on' + eventName, eventHandlerFunctionName);
	} else { // Older browsers
		var currentEventHandler = elementObj['on' + eventName];
		if (currentEventHandler == null) {
			elementObj['on' + eventName] = eventHandlerFunctionName;
		} else {
			elementObj['on' + eventName] = function(e) { currentEventHandler(e); eventHandlerFunctionName(e); }
		}
	}
}