set the param [facet.offset] for EVERY [facet.pivot]

[lzqxb]

HI All:        I need a pagenigation with facet offset.
    There are two or more fields in [facet.pivot], but only one value for 
[facet.offset], eg: facet.offset=10&facet.pivot=field_1,field_2. In this 
condition, field_2 is 10's offset and then field_1 is 10's offset. But what I 
want is field_2 is 1's offset and field_1 is 10's offset. How can I fix this 
problem or try another way to complete?
    Any help is appreciated!