var fDesc=new Array(); fDesc[0] = "A prime number (or a prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself. Prime Number Counter is a small utility to calculate the prime numbers. You can make the software count until a specified number or infinite. Prime Number Counter calculates the last prime number, total number of prime numbers and the elapsed time. You can click stop button whenever you want the software to stop counting."; 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 = ''; } }