function WinOpen0() {
  url = "http://www.hy-t.net/contact/index.html";

  sw = screen.availWidth; 
  sh = screen.availHeight;
  ww = 600;
  wh = 510;
  wl = (sw-ww)/2;
  wt = (sh-wh)/2;
  cwin1 = window.open(url,"Feedback","width=" + ww + ",height=" + wh + ",toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,left=" + wl + ",top=" + wt);
}
function WinOpen1() {
  url = "http://www.hy-t.net/contact/feedback.html";

  sw = screen.availWidth; 
  sh = screen.availHeight;
  ww = 600;
  wh = 510;
  wl = (sw-ww)/2;
  wt = (sh-wh)/2;
  cwin1 = window.open(url,"Feedback","width=" + ww + ",height=" + wh + ",toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,left=" + wl + ",top=" + wt);
}
function WinOpen2() {
  url = "http://www.hy-t.net/contact/question.html";

  sw = screen.availWidth; 
  sh = screen.availHeight;
  ww = 600;
  wh = 510;
  wl = (sw-ww)/2;
  wt = (sh-wh)/2;
  cwin1 = window.open(url,"Question","width=" + ww + ",height=" + wh + ",toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,left=" + wl + ",top=" + wt);
}
function WinOpen3() {
  url = "http://www.hy-t.net/contact/order.html";

  sw = screen.availWidth; 
  sh = screen.availHeight;
  ww = 600;
  wh = 510;
  wl = (sw-ww)/2;
  wt = (sh-wh)/2;
  cwin1 = window.open(url,"Order","width=" + ww + ",height=" + wh + ",toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,left=" + wl + ",top=" + wt);
}