>>>Look at the switch command
>>
>>Switch will not help me in this case as I need 3 cases:
>>
>>Both variables defined
>>
>>startTime defined
>>
>>endTime defined
>>
>>I don't see how switch can help - switch is only for checking a single variable against predefined values.
>
>That's the problem.... if its not in a blog post, you can't figure it out....Learn to think outside a blog post...

I don't see how it could be used in any efficient way since the parameter to a switch statement must be a simple type.