var fDesc=new Array(); fDesc[0] = "What is DC Proof?
- Free, PC-based educational software
- Logic-checking software provides instant feedback as you enter every line of proof
- Includes interactive tutorial that introduces the standard methods of proof using simple examples and exercises"; 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 = ''; } }