var fDesc=new Array(); fDesc[0] = "GeoGebra Math Apps is an open-source dynamic mathematics software for learning and teaching at all levels. The program brings together geometry, algebra, spreadsheets, graphing, statistics, and calculus in one easy-to-use package. It provides different Views for mathematical objects. Each View offers its own toolbar that contains a selection of tools, commands, and predefined functions and operators that allow you to create dynamic constructions with different representations of mathematical objects."; 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 = ''; } }