// Werte in old_src_tmp um jeweil -1 verschieben da es sich nach dem absoluten pfad richtet

$(function(){
	$('#menu img').hover(function(){
		var old_src = this.src;
		var old_src_tmp = old_src.split('/');
		console.log(old_src_tmp);
		old_src_tmp2 = old_src_tmp[6].split('.');
		var new_src = old_src_tmp[4] + '/' + old_src_tmp[5] + '/' + old_src_tmp2[0] + '_f2.' + old_src_tmp2[1];
		this.src = new_src;
	}, function(){
		$(this).attr('src', this.src.replace('_f2', ''));
	});
});