html - Writing in a <div> with JavaScript -

The one I am trying to get is:
a & Lt; Div & gt; ; which shows "You've selected Seat 1." Message, when i & lt; Div & gt; Clicking the associated button under is also possible to click several buttons, as a result should be displayed as appropriate "you have selected 1, ... and x." message.

Question
How can I get this?

Side info
I need this for several buttons because it is a cinema reservation system.

What I've done so far

   & Lt; Input class = "textButton" type = "button" id = "button2" value = "seat 2" onclic = "text (button2)" /> & Lt; Div id = "bookingDiv" type = "text" & gt; You have selected the button: & lt; / Div & gt; & Lt; / Body & gt; & Lt; / Html & gt;  

Thanks for any advice!

Try it out:

  document.getElementById ("# bookingDiv" ). InnerHTML = "seat 1";