IMAGE is a TYPE attribute value to the INPUT element for FORMs. It
specifies an image that can be clicked upon to pass information to the
processing script. In implementation, this form TYPE acts much like the
INPUT TYPE=SUBMIT field, but unlike the SUBMIT field, the coordinates of
the image that were activated are sent back to the server in addition
to the rest of the form data.
Description:
This is a method of giving access/focus to an active HTML element using
a keyboard character. This is a common GUI paradigm also known
as a "keyboard shortcut" or "keyboard accelerator"
A single character is used as the value of this attribute. In addition,
a platform-dependent key is usually used in combination with the
ACCESSKEY character to access the functionality of the active field.
Values:
A single, case-insensitive alphanumeric character from a browser's
character set.
Align
2 | 3
| 3.2 | 4
| IE1 | M2B1
| N1
Required? No
Description:
This attribute specifies the alignment of text following the IMG
reference relative to the graphic on screen. 'Left' and 'Right'
specify floating horizontal alignment of the image in the browser
window, and subsequent text will wrap around the image. The other
options specify vertical alignment of text relative to the image
on the same line.
Values: Left | Right |
Top [DEFAULT] |
Texttop |
Middle | Absmiddle |
Baseline | Bottom |
Absbottom
Alt
2 | 3
| 3.2 | 4
| IE4B2 | M
| N
Required? No
Description:
This is text to be displayed in place of an image for browsers that
can not handle this ability or for browsers that have disabled this
ability.
Values: Alphanumeric characters
Disabled
2 | 3
| 3.2 | 4
| IE4B2 | M
| N
Required? No
Description:
This is a stand-alone attribute which indicates the element is
initially non-functional.
Values: NA
Height
2 | 3
| 3.2 | 4
| IE4B1 | M
| N1.1
Required? No
Description:
This attribute explicitly specifies the height of the graphic in pixels.
It is mainly used to create custom image dimensions without physically
changing the image itself. It can also be used to speed up display of the
document being downloaded so it can pre-render the document with image
placeholders while the images download.
Values: Positive integer pixel values.
Name
2 | 3
| 3.2 | 4
| IE1 | M2B1
| N1
Required? Yes
Description:
This is a required attribute that associates a symbolic name to the
field for submittal to the form processing script.
Values: Alphanumeric characters.
onBlur
2
| 3 | 3.2
| 4 | IE4B1
| M | N
Required? No
Description:
A blur Event Handler executes Script code when a Text field in
a form loses focus.
Values: Script statements or an
external function call.
onChange
2
| 3 | 3.2
| 4 | IE
| M | N
Required? No
Description:
A change Event Handler executes Script code when a Text field loses
focus and its value has been modified. This Event Handler is used to
validate data after it is modified by a user.
Values: Script statements or an
external function call.
onFocus
2
| 3 | 3.2
| 4 | IE4B1
| M | N
Required? No
Description:
A focus Event Handler executes Script code when a Text field
receives input focus by tabbing with the keyboard or clicking
with the mouse. Selecting within a field results in a onSelect
event, not a onFocus event.
Values: Script statements or an
external function call.
onSelect
2
| 3 | 3.2
| 4 | IE
| M | N
Required? No
Description:
A select Event Handler executes Script code when a user selects
some of the text within a Text field.
Values: Script statements or an
external function call.
Src
2 | 3
| 3.2 | 4
| IE1 | M2B1
| N1
Required? No
Description:
Indicates the URL to reference the graphic.
Values: Absolute or relative URLs.
Tabindex
2 | 3
| 3.2 | 4
| IE4B1 | M
| N
Required? No
Description:
"Tabbing" is a method of giving access/focus to an active HTML
element using a standard keyboard sequence. All the active elements in a
document can be cycled through using this sequence (ex: Windows TAB key.)
The order of the active elements in this cycle is usually the order they
occur in the document, but the TABINDEX attribute allows a different order
to be established. The use of this attribute should create the following
tabbing order cycle if the browser supports the attribute:
Active elements using the TABINDEX attribute with positive integers are
navigated first. Low values are navigated first.
Active elements not specifying any TABINDEX attribute
Those elements carrying a DISABLED attribute or using negative TABINDEX
values do not participate in the tabbing cycle.
Values: Positive or negative integers.
Type
2 | 3
| 3.2 | 4
| IE1 | M2B1
| N1
Required? Yes*
Description: * This is the required TYPE attribute for
this INPUT mechanism. From the strict view, the TYPE attribute
is not required.
Values:IMAGE
Usemap
2 | 3
| 3.2 | 4
| IE | M
| N2
Required? No
Description:
This attribute specifies the URL (usually internal to the document) of
the client-side image map specification to be used if the browser has
that capability. If the argument to USEMAP begins with a "#"
it is assumed to be in the same document as the INPUT TYPE=IMAGE element.
Values: An absolute or relative URL
or an internal anchor name.
Value
2 | 3
| 3.2 | 4
| IE1 | M2B1
| N1
Required? No
Description:
This represents the symbolic result of the field when activated
that is passed to the form processing script.
Values: Alphanumeric characters.
Width
2 | 3
| 3.2 | 4
| IE4B1 | M
| N1.1
Required? No
Description:
This attribute explicitly specifies the width of the graphic in pixels.
It is mainly used to create custom image dimensions without having to
physically change the image itself. It can also be used to speed up
display of the document being downloaded so it can pre-render the
document with image placeholders while the images download.