javascript上拉列表選中

javascript下拉列表選中
javascript下拉列表選中代碼:

var value = false;   for(i=0;i<document.getElementById("autoDeploy").options.lengtha;i++)   {                if(document.getElementById("object).options[i].value==object.value)                      {                            document.getElementById("object").options[i].selected="selected";break;                     }   }

<script language="JavaScript">       for (i=0;i<document.form1.pageSelect.options.length;i++)       {          if(document.form1.pageSelect.options[i].value==object.value)          {          document.form1.pageSelect.options[i].selected=selected;break;           }        }   </script>