var fDesc=new Array(); fDesc[0] = "Mathematica is a technical computing software package. It has nearly 5000 built-in functions covering various areas of technical computing; all of them are carefully integrated so that they work perfectly together. It uses the Wolfram Language for writing code. Its flexible document-based interface lets you mix executable code, richly formatted text, dynamic graphics, and interactive interfaces."; 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 = ''; } }