Geeks have feelings too

JavaScript: get_class

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/**
 * Returns the name of the class of an object
 *
 * NOTE: This function doesn't work with 'native code', only with user generated classes.
 *
 * based on http://magnetiq.com/2006/07/10/finding-out-class-names-of-javascript-objects/
 *
 * @param object The object
 * @returns mixed Returns the name of the class of which object is an instance. Returns FALSE if object is not an object.
 */
function get_class(obj)
{
	if(obj && obj.constructor && obj.constructor.toString)
	{
		var arr = obj.constructor.toString().match(/function\s*(\w+)/);
		return (arr && (arr.length==2?arr[1]:undefined));
	}
	else
	{
		return undefined;
	}
}