one_dir_up.ahk

OneDirectoryUp(path){
	parts := StrSplit(path, "\")
	result := ""
	Loop % parts.MaxIndex() - 1
	{
	        if(StrLen(result)) {
	                result .= "\"
	        }
	        result .= parts[A_Index]
	}
	result = %result%\
	return result
}