label

This element is used to provide a label for a control element. If the user clicks the label, it will move the focus to the associated control, specified with the control attribute.

More information is available in the XUL tutorial.

Attributes
accesskey, control, crop, disabled, href, value
Properties
accessKey, accessibleType, control, crop, disabled, value
Style classes
header, indent, monospace, plain, small-margin, text-link

Examples

Image:XUL_ref_label.png
<label value="Email address" control="email"/>
<textbox id="email"/>

Attributes

accesskey
Type: character
This should be set to a letter that is used as a shortcut key. This letter should be one of the characters that appears in the label text for the element.

Example

Image:XUL_ref_accesskey_attr.png
<vbox>	
  <label value="Enter Name" accesskey="e" control="myName"/>
  <textbox id="myName"/>
  <button label="Cancel" accesskey="n"/>
  <button label="Ok" accesskey="O"/>
</vbox>

See also

label attribute, acceltext attribute

control
Type: element id
This attribute specifies the id of the element with which the label is associated. When the user clicks on the label, the associated element is given focus.
这个属性定义了元素的id,它与label相关联。当用户点击 label 的时候,相关联的元素将获得焦点。
crop
Type: one of the values below
If the label of the element is too big to fit in its given space, the text will be cropped on the side specified by the crop attribute. An ellipsis will be used in place of the cropped text. If the box direction is reversed, the cropping is reversed.
  • start: The text will be cropped on its left side.
  • end: The text will be cropped on its right side.
  • left: The text will be cropped on its left side.
  • right: The text will be cropped on its right side.
  • center: The text will be cropped in the middle, showing both the start and end of the text normally.
  • none: The text will be not be cropped using an ellipsis. However, the text will simply be cut off if it is too large. The side depends on the CSS text alignment.
disabled
Type: boolean
Indicates whether the element is disabled or not. If this element is set to true the element is disabled. Disabled elements are usually drawn with grayed-out text. If the element is disabled, it does not respond to user actions, it cannot be focused, and the command event will not fire.


Image:XUL_ref_attr_disabled.png
<!-- Checkbox enables/disables the button -->
<checkbox label="Enable button" 
    onclick="document.getElementById('buttRemove').disabled = this.checked"/>
<button id="buttRemove" label="Remove All" disabled="true"/>
href
Type: string
Defines a URL to open when this element is clicked. Requires the class attribute to include text-link.
value
Type: string
The text to be used for the label.

Properties

accessKey
Type: character
Gets and sets the value of the accesskey attribute.
accessibleType
Type: integer
A value indicating the type of accessibility object for the element.
control
Type: element id
Gets and sets the value of the control attribute.
crop
Type: string
Gets and sets the value of the crop attribute.
disabled
Type: boolean
Gets and sets the value of the disabled attribute.
value
Type: string
Gets and sets the value of the value attribute.

Methods

Inherited from XUL element
blur, click, doCommand, focus, getElementsByAttribute

Inherited from DOM element
addEventListener(), appendChild(), dispatchEvent(), getAttribute(), getAttributeNode(), getAttributeNodeNS(), getAttributeNS(), getElementsByTagName(), getElementsByTagNameNS(), hasAttribute(), hasAttributeNS(), hasAttributes(), hasChildNodes(), insertBefore(), isSupported(), normalize(), removeAttribute(), removeAttributeNode(), removeAttributeNS(), removeChild(), removeEventListener(), replaceChild(), setAttribute(), setAttributeNode(), setAttributeNodeNS(), setAttributeNS()

Style classes

The following classes may be used to style the element. These classes should be used instead of changing the style of the element directly since they will fit more naturally with the user's selected theme.

header
A class used for headings. Typically, this will cause the text to appear bold.
indent
This class causes the text to be indented on its left side.
monospace
This class causes the text to be displayed in a monospace font.
plain
This class causes the element to be displayed with no border or margin.
small-margin
This class causes the text to be displayed with a smaller margin.
text-link
Labels with this class may be focused and the click handler run or the address in the href attribute opened on a mouse click or Enter key press. Labels will appear like a link (blue and underlined).

Elements
description
Attributes
label
Interfaces
nsIAccessibleProvider, nsIDOMXULLabelElement

User notes

Remember that the label element has a "value" attribute, unlike value in HTML whereas buttons, checkboxes use label="foo" as the attribute

<label label="A Caption"/> <-- wrong -->
<label value="A Caption"/>

<label value="Click the button"/>
<button label="A Button"/>
<checkbox label="A Decision" value="1"/>


Document Tags and Contributors

Contributors to this page: Cuimingda
最后编辑者: Cuimingda,