VGA Splitters.

Hi. Does anyone know of any VGA splitter that can display different resolutions on the monitors? I have a 15 inch lcd monitor on top of a check-in desk. We want the reception computer to display certain information to patients who come in the door. But her monitor is a 19 inch. She would like to keep her display at a resolution higher than 1024 X 768. But 1024 X 768 is the highest the 15 inch will do.

Thank you.