var newWindow = null;

function NewVid(num) {
  closeWindow();
  if (num==1) {
    newWindow = open("musikfestPg.htm","myWindow","height=520,width=510,left=300,top=200");
  }
  if (num==11) {
    newWindow = open("LuganosPg.htm","myWindow","height=520,width=510,left=300,top=200");
  }
}

function closeWindow() {
  if (newWindow != null) {
    newWindow.close();
    newWindow = null;
  }
}