var fDesc=new Array(); fDesc[0] = "Physion is a 2D Physics simulation program.

The user, using the tools of Physion, can create various physical objects (circles, polygons, gears, etc.) and joints (eg. springs, pulleys etc.) that obey the laws of Physics. This way the user can experiment by creating various scenes/scenarios which can be either simple physics experiments or complex structures/mechanisms.

Physion also allows the users to execute their own scripts/programs in JavaScript. This way Physion can be a nice and friendly tool for introduction to programming since the results of the commands are immediately visualised."; 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 = ''; } }