if ( document.images ) {
  jsbtn_0_def = new Image(82,82)
  jsbtn_0_def.src = "vlmain/islbg/isl_dev_01.jpg"
  jsbtn_0_on = new Image(0,0)
  jsbtn_0_on.src = "vlmain/islbg/isl_ov_01.jpg"
  jsbtn_0_down = new Image(82,82)
  jsbtn_0_down.src = "vlmain/islbg/isl_dev_01.jpg"

  jsbtn_1_def = new Image(82,82)
  jsbtn_1_def.src = "vlmain/islbg/isl_dev_02.jpg"
  jsbtn_1_on = new Image(0,0)
  jsbtn_1_on.src = "vlmain/islbg/isl_ov_02.jpg"
  jsbtn_1_down = new Image(82,82)
  jsbtn_1_down.src = "vlmain/islbg/isl_dev_02.jpg"

  jsbtn_2_def = new Image(82,82)
  jsbtn_2_def.src = "vlmain/islbg/isl_dev_03.jpg"
  jsbtn_2_on = new Image(0,0)
  jsbtn_2_on.src = "vlmain/islbg/isl_ov_03.jpg"
  jsbtn_2_down = new Image(82,82)
  jsbtn_2_down.src = "vlmain/islbg/isl_dev_03.jpg"

  jsbtn_3_def = new Image(82,82)
  jsbtn_3_def.src = "vlmain/islbg/isl_dev_04.jpg"
  jsbtn_3_on = new Image(0,0)
  jsbtn_3_on.src = "vlmain/islbg/isl_ov_04.jpg"
  jsbtn_3_down = new Image(82,82)
  jsbtn_3_down.src = "vlmain/islbg/isl_dev_04.jpg"

  jsbtn_4_def = new Image(82,82)
  jsbtn_4_def.src = "vlmain/islbg/isl_dev_05.jpg"
  jsbtn_4_on = new Image(0,0)
  jsbtn_4_on.src = "vlmain/islbg/isl_ov_05.jpg"
  jsbtn_4_down = new Image(82,82)
  jsbtn_4_down.src = "vlmain/islbg/isl_dev_05.jpg"

  jsbtn_5_def = new Image(82,82)
  jsbtn_5_def.src = "vlmain/islbg/isl_dev_06.jpg"
  jsbtn_5_on = new Image(0,0)
  jsbtn_5_on.src = "vlmain/islbg/isl_ov_06.jpg"
  jsbtn_5_down = new Image(82,82)
  jsbtn_5_down.src = "vlmain/islbg/isl_dev_06.jpg"

}

function mouse_over(name) {
  if ( document.images ) {
    document[name].src = eval(name + "_on.src");
  }
}

function mouse_down(name) {
  if ( document.images ) {
    document[name].src = eval(name + "_down.src");
  }
}

function mouse_off(name) {
  if ( document.images ) {
    document[name].src = eval(name + "_def.src");
  }
}