The ornamental design for a displayhanger for a shower curtain rod, as shown and described.
FIG. 1 is an exploded isometric environmental view of my invention, showing how the hanger engages a shower curtain rod and a display, both of which are shown in dotted lines for illustrative purposes only and form no part of the claimed design;
FIG. 2 is an elevation view of the front of my invention;
FIG. 3 is an elevation view of the back of my invention;
FIG. 4 is an elevation view of one side of my invention, the other side being the mirror image thereof;
FIG. 5 is a plan view of the top of my invention; and,
FIG. 6 is a plan view of the bottom of my invention.