Method analysis of javascript to obtain select values

This article illustrates how javascript gets the select value. Share to everybody for everybody reference. The specific analysis is as follows:

1. Get the displayed Characters

document.getElementById("bigclass").options[window.document.getElementById("bigclass").selectedIndex].text

2. Get id in the database

window.document.getElementById("bigclass").value

3. Get the index id assigned by the select group

window.document.getElementById("bigclass").selectedIndex

Example:

<select name="bigclass" id="bigclass" onChange="javascript:updatePage2();">
<option value="" selected="selected">ajax The experiment </option>
<option value="4"> I'm fit for the city </option>
</select>

Use:

document.getElementById("bigclass").options[window.document.getElementById("bigclass").selectedIndex].text

The result is: I fit the city ha

Use:

window.document.getElementById("bigclass").value

The answer is: 4

Use:

window.document.getElementById("bigclass").selectedIndex

The answer is: 1

I hope this article has been helpful for your javascript programming.