Button for to call to a phone in iphone

Hi
I'm starting to configure mobile for my joomla site. I have a menu for to show some pages, but I have a question, really two questions:
1. How I can configure a menu button on the iphone so people can directly call a phone number?
2. I have tables in some articles that don't shows good (no resize). Is better don't use tables? or you know some procedure for to adapt them? Maybe I would have to create special articles for iphone.

I hope your help.

I answer myself (nobody helped in two weeks)
The code for to call to phone can be insert in Insert link with "callto:(area)-(phone) without ( ). For example I live in Berlin (with 30 phone code), and the phones for to call are from Germany, the code would be "callto:30-40987" (without " ").
And the second answer is yes, is better to adjust tables specially for iphone.