var fDesc=new Array(); fDesc[0] = "EZNEC-ARRL is a special version of EZNEC v. 3.0 or EZNEC v. 4.0 which is included on the ARRL Antenna Book CD. EZNEC-ARRL v. 3.0 is included with the 20th Edition and EZNEC-ARRL v. 4.0 with the 21st Edition. It operates as a normal EZNEC demo program except when a specially "signed" EZNEC description file (included on the Antenna Book CD) is loaded. When analyzing a "signed" file, EZNEC-ARRL becomes a fully functional standard type EZNEC program. Both EZNEC-ARRL v. 3.0 and EZNEC-ARRL v. 4.0 will function with "signed" files from any Antenna Book edition"; 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 = ''; } }