function danceH() {
  slwindow = window.open("update/dance/pop/index.html","dance",'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width=400,height=562');
  slwindow.window.focus();
  wx = 400;
  wy = 562;
  x = (screen.width - wx ) /2;
  y = (screen.height - wy ) /2;
  slwindow.window.moveTo(x,y);
  }
  
function danceW() {
  slwindow = window.open("update/dance/pop/index.html","dance",'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width=562,height=400');
  slwindow.window.focus();
  wx = 564;
  wy = 400;
  x = (screen.width - wx ) /2;
  y = (screen.height - wy ) /2;
  slwindow.window.moveTo(x,y);
  }