function set_target(clickfrm) {
  mfrm=top.frames['mapdisplay'].document.forms['mapform'];
  switch (clickfrm) {
  case 2: top.frames['mapdisplay'].document.getElementById("messagescrn").style.visibility = 'visible';
          mfrm.target = top.frames['mapdisplay'].name;
          mfrm.action = "/oog/genmap.php";
          mfrm.submit();
          break;
  case 3: top.frames['searchwin'].location.href='/oog/feature_zoom.php'
          show_tab("search");
          break;
  }
 }

function preload() {
   if (window.top != window.self) { window.open("/oog","_top",""); }

  imgsrc = new Array ("i_zi_out.png","i_zi2x_out.png","i_p_out.png","i_zo2x_out.png","i_zo_out.png","i_q_out.png","i_zi_in.png","i_zi2x_in.png","i_p_in.png","i_zo2x_in.png","i_zo_in.png","i_q_in.png","i_r_out.png","i_r_in.png");
  img = new Array();
  for(ctr in imgsrc) {
    img[ctr] = new Image();
    img[ctr].src = "/oog/icons/" + imgsrc[ctr];
    }
  setaction("zoom in box");
  }

function setaction(click_function) {
  document.zoom_in.src="/oog/icons/i_zi_out.png";
  document.zoom_out.src="/oog/icons/i_zo_out.png";
  document.pan.src="/oog/icons/i_p_out.png";
  document.zoom_in_2x.src="/oog/icons/i_zi2x_out.png";
  document.zoom_out_2x.src="/oog/icons/i_zo2x_out.png";
  document.query.src="/oog/icons/i_q_out.png";
  document.reset.src="/oog/icons/i_r_out.png";
  func=window.parent.frames['mapdisplay'].document.forms['mapform'].elements['z'];
  mapobj=window.parent.frames['mapdisplay'].document.getElementById('map');
  mapobj.style.cursor='crosshair';
  switch (click_function) {
    case "zoom in box" : func.value = 1 ;
               document.zoom_in.src="/oog/icons/i_zi_in.png";
               break;
    case "zoom in 2x" : func.value = 2;
               document.zoom_in_2x.src="/oog/icons/i_zi2x_in.png";
               break;
    case "pan" : func.value = 3;
               document.pan.src="/oog/icons/i_p_in.png";
               mapobj.style.cursor='move';
               break;
    case "zoom out 2x" : func.value = 4;
               document.zoom_out_2x.src="/oog/icons/i_zo2x_in.png";
               break;
    case "zoom out box" : func.value = 5;
               document.zoom_out.src="/oog/icons/i_zo_in.png";
               break;
    case "query" : func.value = 6
               document.query.src="/oog/icons/i_q_in.png";
               mapobj.style.cursor='help';
               break;
    case "reset" : document.reset.src="/oog/icons/i_r_in.png";
                   mfrm=top.frames['mapdisplay'].document.forms['mapform'];
                   mfrm.z.value = 7;
                   mfrm.target = top.frames['mapdisplay'].name;
                   mfrm.action = "/oog/genmap.php";
                   mfrm.submit();
                   setaction('zoom in box');
                   break;
   case "redraw" :
    }
  }