var fDesc=new Array(); fDesc[0] = "LaserCalc is an open source application designed for laser optics simulation. Optical paths consisting of various elements such as distances and lenses can be defined. LaserCalc calculates the propagation through this system. Several tools assist the user during the development of an optical system."; 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 = ''; } }