明确 <option value>在表格提交

Question

As part of a html form, i have a select box.

<select id="test" name="test">
<option value="text1">Text1</option>
<option value="text2">Text2</option>
</select>
<input type="text" id="my_text_box" name="my_text_box" class="hidden" />

Using javascript, how can I remove the value "text2" from the results the form emails to me?

EDIT:

I need to keep Text2. When the user selects this, the select box changes to a text input, using the script below. I need to remove the value "text2" from the resulting text input.

 window.onload = function(){
 var dropDown = document.getElementById("test");
 dropDown.onchange = function() {
 var dropDownValue = this.value;
 if (dropDownValue == "text2") {
    dropDown.style.display = 'none';
    var textBox = document.getElementById("my_text_box");
    textBox.style.display = 'inline';
    textBox.value = 'Please enter something..';
  } else {
    dropDown.style.display = 'inline';
    textBox.style.display = 'none';
   };

   }

Answer 1

 document.getElementById('test').options[1].value = 'emailId';