var fDesc=new Array(); fDesc[0] = "Eigenmath is a small application that can make graphs to mathematical functions. It is simple to use, and has a user manual that explains all the functions, so even the novice user will be able to make graphs very quickly. It can calculate derivatives, gradients, template functions, integrals as well as make graphs to arc length, line integrals, surface area, surface integrals, green's theorem, stokes' theorem."; 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 = ''; } }