SQL & PL/SQL

Hi all,

I have a date field column with varchar2 as datatype :

create table t1 (id number,date1 varchar2(35))

insert into (1,' 3/13/2011 10:22 AM');

insert into (2,' 3/14/2011 10:22 AM');
insert into (3,' 3/15/2011 10:22 AM');


I want to update table2 

create table t1 (id number,date1 timestamp(3))

insert into (1,' ');

insert into (2,' ');
insert into (3,' ');

I want to update t2 with date column in t1
can any one help me

Thanks in advance!!!!!