FIG. 1 is a front elevation view of a door panel of the present invention; FIG. 2 is a front perspective view thereof; FIG. 3 is a cross-sectional view taken along line 3—3 of FIG. 1; and, FIG. 4 is a cross-sectional view taken alone line 4—4 of FIG. 1. Broken lines are for illustrative purposes and form no part of the claim.