How to build url for social bookmark

I am little bit confused about my post title. While working with my  forum for bookmarking feature I just listed the popular social bookarmark sites and there’s bookmarking urls. Hope this will help you . Here is the list and urls

http://del.icio.us/post?url=url_is_here&title=title_is_here
http://digg.com/submit?phase=2&url=url_is_here&title=title_is_here
http://www.facebook.com/share.php?u=url_is_here
http://www.google.com/bookmarks/mark?op=edit&bkmk=url_is_here
http://slashdot.org/bookmark.pl?title=title_is_here&url=url_is_here
http://www.stumbleupon.com/submit?url=url_is_here
http://technorati.com/faves?add=url_is_here