var fDesc=new Array(); fDesc[0] = "Probably the most important part of the APRS Radio Tracking system, is the computer software program which, amongst many other things, must display the Trackers on a topographical map. There are several APRS tracking programs available in the world, but the main problem we struck straight away was that they are incompatible with the New Zealand NZMG map projection. Also, these APRS programs, while some of them have many features, they are not geared toward Search and Rescue. For example, Tactical call signs and multi colour tracks are not available."; function tShowHide(id, show) { var s = document.getElementById("desc"); if ((s.innerHTML.length<=212 || show==1) && show!=2) { s.innerHTML = fDesc[id]; if (document.getElementById('m1')) document.getElementById('m1').style.display='none'; if (document.getElementById('m2')) document.getElementById('m2').style.display='none'; if (document.getElementById('more_txt')) document.getElementById('more_txt').style.display='inline'; } else { s.innerHTML = ''; } }