private void setImageParameters() {
        String s;
        Image i;

        s = getParameter("physicalImage");
        if (s != null) {
            i = getImage(getDocumentBase(), s);
            biorhythmCanvas.setPhysicalImage(i);
        }

        s = getParameter("sensitivityImage");
        if (s != null) {
            i = getImage(getDocumentBase(), s);
            biorhythmCanvas.setSensitivityImage(i);
        }

        s = getParameter("intellectualImage");
        if (s != null) {
            i = getImage(getDocumentBase(), s);
            biorhythmCanvas.setIntellectualImage(i);
        }
    }