var fDesc=new Array(); fDesc[0] = "BlendCalc is a wide-screen projection calculator. Use it to determine how many projectors are needed to create a wide-screen image. Specify the screen size, projector type and throw distance or lens ratio and it calculates projector positions, pixel space and overlap. If a perfect fit is not possible then a best-fit solution is provided. Explore any given solution by changing the number of specified projectors at the touch of a button."; 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 = ''; } }