どのようにselectのコンボボックスの値を取得しますか?

       
       
       



     window.onload = funciton(){
            var param = document.getElementById("param1");
            param.onchange =  getParam(){
                  var text = param.value;
            }
      }

       
       
       



     window.onload = funciton(){
            var param = document.getElementById("param1");
            param.onchange =  getParam(){
                  var selectIndex = param.selectIndex;  //         </code></pre> 
  <pre><code class="language-html">                  var text = param.options[selectIndex].text;   </code></pre> 
  <pre><code class="language-html">            }
      }