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id attribute | id property

Sets or retrieves the string identifying the object.

Syntax

HTML<element id="p" ... >
JavaScript

p = object.id

 

Property values

Type: String

any alphanumeric string that begins with a letter. The underscore (_) can also be used.

Remarks

The id is an SGML identifier used as the target for hypertext links or for naming particular objects in associated style sheets.

The id should be unique throughout the scope of the current document. If a document contains more than one object with the same identifier, the objects are exposed as a collection that can be referenced only in ordinal position.

Examples

This example gets the id attribute of each cell of a table. When the user clicks a cell, the object of the cell is passed to a function which returns the object's ID.

Code example: http://samples.msdn.microsoft.com/workshop/samples/author/dhtml/refs/id.htm


<script type="text/javascript">
function getID(oObject) 
{
    var id = oObject.id;
    alert("This object's ID attribute is set to \"" + id + "\"."); 
}
</script>
<table border="">
    <tr>
        <td id="firstCell" onclick="getID(this);">Table Cell 1</td>
        <td id="secondCell" onclick="getID(this);">Table Cell 2</td>
        <td id="thirdCell" onclick="getID(this);">Table Cell 3</td>
    </tr>
</table>

See also

a
abbr
acronym
address
applet
area
b
base
baseFont
bdo
bgSound
big
blockQuote
body
br
button
caption
center
cite
code
col
colGroup
comment
custom
dd
del
dfn
dir
div
dl
dt
em
embed
fieldSet
font
form
frame
frameSet
head
hn
hr
html
i
iframe
img
input type=button
input type=checkbox
input type=email
input type=file
input type=hidden
input type=image
input type=number
input type=password
input type=radio
input type=range
input type=reset
input type=search
input type=submit
input type=tel
input type=text
input type=url
ins
isIndex
kbd
label
legend
li
link
listing
map
marquee
menu
nextID
noBR
noFrames
noScript
object
ol
optGroup
option
p
plainText
pre
q
rt
ruby
s
samp
script
select
small
span
strike
strong
style
styleSheet
sub
sup
table
tBody
td
textArea
tFoot
th
tHead
title
tr
tt
u
ul
var
wbr
xml
xmp

 

 

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