[рони]

Konstantin47,

<style type="text/css">
    [name='elems']{
        display: none;
    }
    [name='elems'].open{
        display:  initial;
    }
    </style> <script>
document.addEventListener( "DOMContentLoaded" , function() {
 const on = (parent, event, selector, handler) => parent.addEventListener(event, ({target}) => {
     if(target = target.closest(selector)) handler(target)
 })
 const fn = el => {
 document.elems.classList.add("open")
 //alert(`${el.textContent} форма открывайся, раз, два!!!`);
 }
 on(document, "click", "#calendar2 tbody td", fn);
  });
    </script>