Onclick Event with Css

Question

im trying to implement a onClick event to a navbar in css. This is my code so far:

<div id="nav">
                               <ul>
                              <li class = "cat1">
                                  <a href="#">Jahr</a>
                              </li>
                              <li class = "cat2">
                                  <a href="#">Monat</a>
                                  <ul>
                                      <li><a href="#">Januar</a></li>
                                      <li><a href="#">Februar</a></li>
                                      <li><a href="#">März</a></li>
                                      <li><a href="#">April</a></li>
                                      <li><a href="#">Mai</a></li>
                                      <li><a href="#">Juni</a></li>
                                      <li><a href="#">Juli</a></li>
                                      <li><a href="#">August</a></li>
                                      <li><a href="#">September</a></li>
                                      <li><a href="#">Oktober</a></li>
                                      <li><a href="#">November</a></li>
                                      <li><a href="#">Dezember</a></li>
                                  </ul>
                              </li>
                              <li class = "catKultur">
                                  <a href="#">Kunst & Kultur</a>
                              </li>
                              <li class = "catParty">
                                  <a href="#">Party& Nachtleben</a>
                              </li>
                              <li class = "catSport">
                                  <a href="#">Sport</a>
                              </li>
                              <li class = "catKonzert">
                                  <a href="#">Konzert</a>
                              </li>
                              <li class = "catEssen">
                                  <a href="#">Essen & Trinken</a>
                              </li>
                          </ul>
                      </div>

http://jsfiddle.net/dgbn33pv/

but the problem is, that i want to stay the button in red color after i clicked on it and that its switching back in grey after I clicked it again. It this realizable with css and can I check the button state to filter the maincontent?

regards

Answer 1

Sadly CSS does not have an onclick function the best you could hope for in CSS is :active but once you release the mouse button everything goes back to its original state. This is an example of the :active in action

<div id="button">
</div>

#button{
width:150px;
height:50px;
margin:50px auto;
background:#555;
}
#button:active{
background:#f00;
}

http://jsfiddle.net/dgbn33pv/

Answer 2

You can do it with jquery :-

 $('#nav li').on('click', function() { $(this).toggleClass("active"); $(this).siblings().removeClass("active"); }); 

Add following css :-

 #nav li.active{ background: red !important; }