var win=null;

function openWindow(windowName, url, option) {
  var winWidth = 733;
  var winHeight = 471;
  var xPos = (screen.availWidth-winWidth)/2;
  var yPos = (screen.availHeight-winHeight)/2;

  if (option==2) {options = "top=" + yPos + ",left=" + xPos + ",width=650" + ",height=395"  +",resizable=no";}
  if (option==5) {options = "top=" + yPos + ",left=" + xPos + ",width=750" + ",height=490"  +",resizable=no";}
  if (option==6) {options = "top=" + yPos + ",left=" + xPos + ",width=350" + ",height=190"  +",resizable=no,scrollbars=yes";}
  if (option==7) {options = "top=" + yPos + ",left=" + xPos + ",width=655" + ",height=500"  +",resizable=yes,scrollbars=yes";}

  win=window.open(url, windowName, options);
}