if (document.images) {
  doctor_nav_r1_c1_f2 = new Image(143 ,36); doctor_nav_r1_c1_f2.src = "doctor_nav_bar/images/doctor_nav_r1_c1_f2.gif";
  doctor_nav_r1_c1_f1 = new Image(143 ,36); doctor_nav_r1_c1_f1.src = "doctor_nav_bar/images/doctor_nav_r1_c1.gif";
  doctor_nav_r2_c1_f2 = new Image(143 ,36); doctor_nav_r2_c1_f2.src = "doctor_nav_bar/images/doctor_nav_r2_c1_f2.gif";
  doctor_nav_r2_c1_f1 = new Image(143 ,36); doctor_nav_r2_c1_f1.src = "doctor_nav_bar/images/doctor_nav_r2_c1.gif";
  doctor_nav_r3_c1_f2 = new Image(143 ,36); doctor_nav_r3_c1_f2.src = "doctor_nav_bar/images/doctor_nav_r3_c1_f2.gif";
  doctor_nav_r3_c1_f1 = new Image(143 ,36); doctor_nav_r3_c1_f1.src = "doctor_nav_bar/images/doctor_nav_r3_c1.gif";
  doctor_nav_r4_c1_f2 = new Image(143 ,36); doctor_nav_r4_c1_f2.src = "doctor_nav_bar/images/doctor_nav_r4_c1_f2.gif";
  doctor_nav_r4_c1_f1 = new Image(143 ,36); doctor_nav_r4_c1_f1.src = "doctor_nav_bar/images/doctor_nav_r4_c1.gif";
  doctor_nav_r5_c1_f2 = new Image(143 ,42); doctor_nav_r5_c1_f2.src = "doctor_nav_bar/images/doctor_nav_r5_c1_f2.gif";
  doctor_nav_r5_c1_f1 = new Image(143 ,42); doctor_nav_r5_c1_f1.src = "doctor_nav_bar/images/doctor_nav_r5_c1.gif";
  doctor_nav_r6_c1_f2 = new Image(143 ,36); doctor_nav_r6_c1_f2.src = "doctor_nav_bar/images/doctor_nav_r6_c1_f2.gif";
  doctor_nav_r6_c1_f1 = new Image(143 ,36); doctor_nav_r6_c1_f1.src = "doctor_nav_bar/images/doctor_nav_r6_c1.gif";
  }