sub:Sending all selected emailid from one page to the sendmail page "TO" field

HI GUYS PLSE HELP ME TO WORK OUT THIS PROBLEM.
I HAVE RESERVATION SYSTEM iF ANY OF OUR PACKAGE TOUR IS CHANGED I NEED TO INFORM THOSE USERS RESERVED FOR THAT PACKAGE TOUR THRU EMAIL.MY PROBLEM IS SELECT ALL USERS FROM A PAGE BY CLICKING THE CHECK BOX (ALONG WITH EMAIL ID FIELD ALSO SELECTED) AND PRESS THE SEND MAIL BUTTON SO ALL EMAID SELECTED SHOULD APPEAR ON THE TO: TEXT FIELD OF THE NEXT PAGE . HOW TO SELECT ALL EMAIL ID BY CHECKING THE CHECKBOX OF PREVIOUS PAGE WITH VALIDATION AND PASSED TO THE EMAIL PAGE TO: TEXT BOX. THEIR THE EMAIL SHOULD BE SEPARATED BY ';'.
PLSE GIVE U'R VALUBLE IDEA'S WITH SOURCE CODE
THANKS
SUMESH

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