var fDesc=new Array(); fDesc[0] = "Visual Calculus is a powerful tool for computing and graphing limit, derivative, integral, 3D vector, partial derivative function, double integral, triple integral, series and ODE. The program brings you 3D and 4D scientific data visualization. It is a mathematical computation and visualization program."; 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 = ''; } }