LIMITED POWER OF ATTORNEY
FOR SECTION 16 REPORTING OBLIGATIONS


Know all by these presents, that the undersigned hereby makes,
constitutes and appoints each of (a) the following officers and employees
of DoubleClick Inc. (the "Company"): the General Counsel, any Deputy
General Counsel, the Senior Vice President of Human Resources and the
Corporate Controller and (b) each of the following representatives of Hale
& Dorr LLP: Mark Borden, Esq. and Corey DuFresne, Esq., signing singly and
each acting individually, as the undersigned's true and lawful attorney in
fact with full power and authority as hereinafter described to:


(1)	execute for and on behalf of the undersigned, in the undersigned's
capacity as an officer and/or director of the Company, Forms 3, 4, and 5
(including any amendments thereto) in accordance with Section 16(a) of the
Securities Exchange Act of 1934 and the rules thereunder (the "Exchange
Act");

(2)	do and perform any and all acts for and on behalf of the
undersigned which may be necessary or desirable to prepare, complete and
execute any such Form 3, 4, or 5, prepare, complete and execute any
amendment or amendments thereto, and timely deliver and file such form with
the United States Securities and Exchange Commission and any stock exchange
or similar authority;

(3)	seek or obtain, as the undersigned's
representative and on the undersigned's behalf, information regarding
transactions in the Company's securities from any third party, including
brokers, employee benefit plan administrators and trustees, and the
undersigned hereby authorizes any such person to release any such
information to such attorney in fact and approves and ratifies any such
release of information; and

(4)	take any other action of any type
whatsoever in connection with the foregoing which, in the opinion of such
attorney in fact, may be of benefit to, in the best interest of, or legally
required by, the undersigned, it being understood that the documents
executed by such attorney in fact on behalf of the undersigned pursuant to
this Power of Attorney shall be in such form and shall contain such terms
and conditions as such attorney in fact may approve in such attorney in
fact's discretion.

The undersigned hereby grants to each such attorney
in fact full power and authority to do and perform any and every act and
thing whatsoever requisite, necessary, or proper to be done in the exercise
of any of the rights and powers herein granted, as fully to all intents and
purposes as the undersigned might or could do if personally present, with
full power of substitution or revocation, hereby ratifying and confirming
all that such attorney in fact, or such attorney in fact's substitute or
substitutes, shall lawfully do or cause to be done by virtue of this power
of attorney and the rights and powers herein granted.  The undersigned
acknowledges that the foregoing attorneys in fact, in serving in such
capacity at the request of the undersigned, are not assuming nor relieving,
nor is the Company assuming nor relieving, any of the undersigned's
responsibilities to comply with Section 16 of the Exchange Act.  The
undersigned acknowledges that neither the Company nor the foregoing
attorneys in fact assume (i) any liability for the undersigned's
responsibility to comply with the requirement of the Exchange Act, (ii) any
liability of the undersigned for any failure to comply with such
requirements, or (iii) any obligation or liability of the undersigned for
profit disgorgement under Section 16(b) of the Exchange Act.

This
Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, and 5 with respect to
the undersigned's holdings of and transactions in securities issued by the
Company, unless earlier revoked by the undersigned in a signed writing
delivered to the foregoing attorneys in fact.

IN WITNESS WHEREOF, the
undersigned has caused this Power of Attorney to be executed as of this
11th day of February, 2004.

   /s/ Peter Krainik
Signature


Peter Krainik
Print Name