用javascript操作select(DropDownList)
<select ID="ddl_SortID" Width="120px"> <option Value="1">A</option> <option Value="2">B</option> <option Value="3">C</option></select>
<script language="javascript"><!-- var ddl = document.getElementById('ddl_SortID'); var itemCount = ddl.options.length; for (var i = 0; i < itemCount; i ++) { //让Value="2"的那一项选中 //也可以用ddl.value = "2"; if (dd1.options[i].value == '2') { ddl.selectedIndex = i; }
//让Text="C"的那一项选中 if (dd1.options[i].innerText == 'C') { ddl.selectedIndex = i; }
//删除A项 if (dd1.options[i].innerText == 'A') { ddl.removeChild(ddl.options[i]); }
//4添加value='4' text='D' 这一项 var optNew = document.createElement('option'); optNew.text = 'D'; optNew.value = '4'; try { ddl.add(optName);//仅对IE } catch(ex) { ddl.add(elOptNew, null); //对非IE } }--></script>
