how to find first,previous is disabled in data pager control at first time?

Hello,
I am using listview for binding data and showing on page and used datapager for paging. 
so, after run the project, i will have item on page. for ex: item.aspx page.

here// item is there,
         First Previous 1 2 3 4 5..Next Last  // at the first time, First , previous is disabled and remaing will be enable position. so, here when first,previous is disabled , i wanted to write another method. so how to find first , previous is disabled.

help needed.