Example to calculate the distance b/w 2 places - yahoo maps

Hi all,

I am unable to find an example which calculates the distance b/w 2 given address using yahoo map api :
Example:
From : newbury, boston, MA, US
To : LaGuardia Airport, NY, US

I do not want to show a map on the web page,but i need the api so that i can call it by passing the above two addresses.

I use php and javascript for getting the address. Now with the from and to address in my javascript variables, i want to get the distance b/w them.

Can any one guide me to the correct location?

Thanks,
Sundar