sclass HDivWithVerticalExpandButton {
  int initialHeight;
  S expandButtonText = "Read more";
  O contents;
  
  *(int *initialHeight, O *contents) {}
  
  S html() {
    ret div(contents, class := "expandable", 
      style := "padding: 20px 10px; max-height: " + initialHeight + "px; overflow: hidden;") + "\n"
      + hbutton(expandButtonText, onclick := [[
        $(this).prev('.expandable').css('max-height', 'none');
        $(this).hide();
      ]], style := "display: none", onload := "var btn = this; function check() { $(btn).toggle($(btn).prev('.expandable').outerHeight() >= " + initialHeight + "); setTimeout(this, 5000); } "
         + "check(); setTimeout(check, 1000);");
  }
  
  bool needsJQuery() { true; }
}