A little experience of using prototype (IV.)

Source: Internet
Author: User

Using the Field object to Manipulate table fields (Api:http://www.prototypejs.org/api/form)

Sample code:

<script src= "Prototype-" type= "Text/javascript" ></script>
<input id= "Text1" type= "text"/><br>
<input id= "Text2" type= "text"/><br>
<input id= "Text3" type= "text"/><br>
<input id= "Text4" type= "text" value= "xxxxxxxxx"/><br>
<select size= "3" id= "St1" >
<input type= "button" value= "AA" onclick= "field.clear (' Text1 ', ' text2 ', ' Text3 ')"/><br>
<input type= "button" value= "BB" onclick= "Alert (field.present (' Text1 ', ' text2 ', ' Text3 ')") "/><br>
<input type= "button" value= "CC" onclick= "Field.focus (' Text3 ')"/><br>
<input type= "button" value= "dd" onclick= "Field.select (' Text4 ')"/><br>
<input type= "button" value= "ee" onclick= "field.activate (' St1 ')"/><br>

Function Description:

1.clear: Clears all form field values passed into this method.

2.present: Determines whether all form fields have a value.

3.focus: Specifies the focus.

4.select: Select the text within the form field (text box only, text is valid).

5.activate: With Select and one more feature: if the target element is not selected, the focus moves to the target element.

In addition, you can use the Form.element object with the sample code as follows:

<script src="prototype-" type="text/javascript"></script>
<input id="text1" name="text1" type="text" /><br>
<input type="button" value="aaa" onClick="alert (Form.Element.serialize('text1'));"/><br>
<input type="button" value="bbb" onClick="alert (Form.Element.getValue('text1'));"/><br>

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