Exhibit 23.1 CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of our report, dated February 9, 2000, relating to the financial statements of Hartscup Corporation included in the Company's Annual Report on Form 10-KSB for the year ended December 31, 1999. SINGER LEWAK GREENBAUM & GOLDSTEIN LLP Los Angeles, California July 19, 2000