求救(刷装备出现这样提示如何解决)

Fatal error: Call to undefined function mssql_pconnect() in D:\Elysium_Local\tools\htdocs\includes\Mssql.php on line 77
' M, g3 m" R+ b' _6 O# V7 n5 h
! t% g$ c* X$ ]  R! s怎么解决