var fDesc=new Array(); fDesc[0] = "Drivers are needed by all computer operating systems so that they can communicate with the hardware that makes up the computer. Windows and Linux are examples of operating systems, and the hardware is anything apart from the operating system itself, including video cards, keyboards, hard drives, the mouse, DVD player and so on. Drivers, also called controllers, are simply small software programs that explain to your computer operating system how the hardware works. Imagine you buy a new video cassette recorder."; 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 = ''; } }