function OpenWindow(myURL, n, w, h, r, s) {
  ExtWin = window.open(myURL, n, 'width='+w+', height='+h+',  resizable='+r+', scrollbars='+s+', toolbar=0, menubar=0, location=0');
  ExtWin.moveTo(((screen.width/2)-(w/2)), ((screen.height/2)-(h/2)));
  ExtWin.focus();
}


function gmail() {
  msg = "tomas DOT kavalek AT gmail DOT com\n";    
  alert(msg);
}