var fDesc=new Array(); fDesc[0] = "Knots can be loaded from a database of more than 3,000 knots and links or sketched by hand in three dimensions. Also, knots may be constructed via the Conway notation or using the tangle calculator. A number of special knot types (torus knots, knot chains, Lissajous knots) may be created on the fly. Finally, new knots can be created from old knots by various tranformation tools. Using all these features allows the creation of quadrillions of different knots (and many more)."; 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 = ''; } }