url = wo.pager_ajaxUrl ? wo.pager_ajaxUrl
                    // allow using '{page+1}' in the url string to switch to a non-zero based index
                    .replace( /\{page([\-+]\d+)?\}/, function( s, n ) { return p.page + ( n ? parseInt( n, 10 ) : 0 ); })
                    // this will pass "all" to server when size is set to "all"
                    .replace( /\{size\}/g, p.size ) : '',