if (document.images) {
h_arr_up_on = new Image(25 ,17); h_arr_up_on.src = "images/h_arr_up_f2.gif";
h_arr_up_off = new Image(25 ,17); h_arr_up_off.src = "images/h_arr_up.gif";
h_arr_dn_on = new Image(25 ,17); h_arr_dn_on.src = "images/h_arr_dn_f2.gif";
h_arr_dn_off = new Image(25 ,17); h_arr_dn_off.src = "images/h_arr_dn.gif";
l2_arr_up_on = new Image(25 ,17); l2_arr_up_on.src = "images/l2_arr_up_f2.gif";
l2_arr_up_off = new Image(25 ,17); l2_arr_up_off.src = "images/l2_arr_up.gif";
l2_arr_dn_on = new Image(25 ,17); l2_arr_dn_on.src = "images/l2_arr_dn_f2.gif";
l2_arr_dn_off = new Image(25 ,17); l2_arr_dn_off.src = "images/l2_arr_dn.gif";
}

function imgOn(imgName) {
      if (document.images) {
		document[imgName].src = eval(imgName + "_on.src");
      }
}
function imgOff(imgName) {
      if (document.images) {
		document[imgName].src = eval(imgName + "_off.src");
      }
}