JavaScript Gets the Select Value method analysis _javascript techniques

The examples in this article describe the way JavaScript gets select values. Share to everyone for your reference. The specific analysis is as follows:

1. Get the displayed Kanji

Copy Code code as follows:

document.getElementById ("Bigclass"). Options[window.document.getelementbyid ("Bigclass"). SelectedIndex].text

2. Get the IDs in the database

Copy Code code as follows:

Window.document.getElementById ("Bigclass"). Value

3. Get the index ID of the select Group assignment

Copy Code code as follows:

Window.document.getElementById ("Bigclass"). SelectedIndex

Example:

<select name= "Bigclass" id= "Bigclass" onchange= "Javascript:updatepage2" (); " >
<option value= "" selected= "selected" >ajax experiment </option>
<option value= "4" > I fit the city ha </ Option>
</select>

Use:

Copy Code code as follows:

document.getElementById ("Bigclass"). Options[window.document.getelementbyid ("Bigclass"). SelectedIndex].text

The result: I am suitable for the city ha

Use:

Copy Code code as follows:

Window.document.getElementById ("Bigclass"). Value

The result: 4

Use:

Copy Code code as follows:

Window.document.getElementById ("Bigclass"). SelectedIndex

The result: 1

I hope this article will help you with your JavaScript programming.