直接把text的文字加到dropdownlist中(在线急)

Question

<SCRIPT LANGUAGE="JavaScript">
<!--
function Add(){
var o = document.createElement("option")
o.text = txtName.value
selList.options.add(o)
}
function Delete(){
selList.options.remove(selList.selectedIndex)
}
//-->
</SCRIPT>
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
  <td width="23%"><input type="text" name="txtName" maxlength="9" class="input" size="30">&nbsp;
  <td width="77%"><input name="Submit2" type="submit" class="button" value="Add into List" onclick="Add()">                              
</tr>
<tr>
  <td colspan="2"><p>
<select id="selList" size="5"  style="width:289 ">
</select>
  </p>
<p>
  <input type="button" name="Submit" value="Delete" onclick="Delete()">                            
  </p></td>
</tr>
  </table>

Answer 1

type="submit" >> type="button"
onclick="select.options[select.length]=new Option(value,value)"onclick="select.option[select.selectedIndex]=null"

Answer 2

harryCom() 
---------------
新加的要在上面，下面要加多了就看不到了

Answer 3

<SCRIPT LANGUAGE="JavaScript">
<!--
function Add(){
var o = document.createElement("option")
o.text = txtName.value
selList.options.add(o,0)
}
function Delete(){
selList.options.remove(selList.selectedIndex)
}
//-->
</SCRIPT>
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
  <td width="23%"><input type="text" name="txtName" maxlength="9" class="input" size="30">&nbsp;
  <td width="77%"><input name="Submit2" type="submit" class="button" value="Add into List" onclick="Add()">                              
</tr>
<tr>
  <td colspan="2"><p>
<select id="selList" size="5"  style="width:289 ">
</select>
  </p>
<p>
  <input type="button" name="Submit" value="Delete" onclick="Delete()">                            
  </p></td>
</tr>
  </table>