javascript - Opacity on selected option -

i have toggle button allow user select 1 or 2 rows

so when user click on id remove or add class , show diferents rows, need add opacity on toggle button, how?, need show opacity on actual selected toggle button.

    jquery("#one-row").click(function () {                          $('.product-list').removeclass('-two-columns');                          $('.product-list').addclass('-one-columns');                      });      jquery("#two-rows").click(function () {                          $('.product-list').removeclass('-one-columns');                          $('.product-list').addclass('-two-columns');                      });

    .toggle-one{          background-image: url(images/toggle_1.svg);          width: 30px;          height: 10px;          float: right;          display: inline-block;          cursor: pointer;      }            .toggle-two{          background-image: url(images/toggle_2.svg);          width: 30px;          height: 10px;          float: right;          display: inline-block;          cursor: pointer;      }

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <div class="toggle-rows" style="top: 118px;          right: 30px;          position: absolute;">              <nav>                  <ul>                      <li style="display: inline-block;">                          <div class="toggle-one "  id="onw-row">                                                      </div>                      </li>                        -                       <li style="display: inline-block;">                          <div class="toggle-two" id="two-rows">                                                      </div>                      </li>                  </ul>              </nav>      </div>

i'd say, add 2 lines each buttons similar this:

jquery("#one-row").click(function () {   $('.product-list').removeclass('-two-columns');   $('.product-list').addclass('-one-columns');   $("#one-row").css("opacity", "1");   $("#two-rows").css("opacity", "0.3");                    }); jquery("#two-rows").click(function () {   $('.product-list').removeclass('-one-columns');   $('.product-list').addclass('-two-columns');   $("#one-row").css("opacity", ".0.3");   $("#two-rows").css("opacity", "1"); });