var fDesc=new Array(); fDesc[0] = "Each picture can be divided into a 2 x 2 puzzle with one missing piece, up to a 7 x 7 puzzle with seven missing pieces. Each puzzle has three levels of difficulty, giving the teacher the opportunity to challenge the user. Each program can open graphics in a variety of formats so that users can be offered familiar pictures."; 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 = ''; } }