Anxious, the master comes in to see Ah.

mochou

var TDName = "TDFilter" .concat (Num);
TDName.style.display = "block";

Why is my alert (TDName) displayed correctly, but it does n’t work when I use style?

For example, my Num is 2, and after connecting, my TDName is TDFilter2, and I have this TD on my page, but why is the following sentence wrong? ? ?

mochou

Get it.
With document.getElementById (TDName) .style.display = "block";
Alright, haha.