select 选中 js

Question

<select name="iSex" style="width: 45px; font-size: 16px" id="iSex" onclick="iSex()">
                       <option value="1"  >男</option>
                        <option value="2"  >女</option>
</select>
 <script type="text/javascript">
                 function iSex()
                 {               var ti=document.getElementsByName("iSex");
               for(var i=1;i<=ti.length;i++)
               {
               var ont_ti=ti[i];
               if(ont_ti.selected)
               {
                 selected="selected";
               }
               }                 }
                 </script>  还是取不到值  有好的办法介绍一个很好  答案对 立马给分

Answer 1

    <select name="iSex" style="width: 45px; font-size: 16px" id="iSex" onchange="iSex(this)">
        <option value="1">男</option>
        <option value="2">女</option>
    </select>
    <script type="text/javascript">
        function iSex(sel) {
            var opt = sel[sel.selectedIndex];
            alert(opt.innerHTML);
            alert(opt.value);
        }
    </script>

Answer 2

<select name="iSex" style="width: 45px; font-size: 16px" id="iSex" onchange="iSex()">
  <option value="男" >男</option>
  <option value="女" >女</option>    <script language="javascript" type="text/javascript">
        function iSex() {
            var a = document.getElementById("iSex").value;
            alert(a);
        }   
    </script>