var fDesc=new Array(); fDesc[0] = "The FRED Optical Engineering Software is capable of simulating the propagation of light through any optomechanical system by raytracing. Whether the design is imported from CAD, a lens design program, or constructed from within the software itself, FRED provides engineers with the essential tool for virtual prototyping optical systems."; 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 = ''; } }