var fDesc=new Array(); fDesc[0] = "Visual Matrix is a calculator for matrix operations and matrix decompositions. You can perform basic matrix operations such as addition, subtraction, determinant, inverse, rank etc. Matrix decomposition methods such as LU decomposition and QR decomposition are available."; 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 = ''; } }