http://www.xulplanet.com/tutorials/xultu/inputs.html http://www.xulplanet.com/reference/elemref/ref_checkbox.html An element that can be turned on and off. This is most commonly rendered as a box when the element is off and a box with a check when the element is on. The user can switch the state of the check box by selecting it with the mouse. A label, specified with the label attribute may be added beside the check box to indicate to the user as to its function. nsIAccessibleProvider nsIDOMXULCheckboxElement 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 checkbox. This letter will typically be drawn underlined, although this behavior will be platform and theme specific. When the user presses ALT (or a similar key that varies on each platform) and the access key, the checkbox will be activated from anywhere in the window. Although the value is case insensitive, a letter with the case matching the accesskey attribute will used if both cases exist in the label. Indicates whether the checkbox is checked or not. Set to the id of a command element that is being observed by the element. If the label of the checkbox is too small 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. The text will be cropped on its left side. The text will be cropped on its right side. (Deprecated) The text will be cropped on its left side. (Deprecated) The text will be cropped on its right side. The text will be cropped on both sides. 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. Indicates whether the checkbox is disabled or not. If this attribute is set to true, the checkbox is disabled. This is usually drawn with the text in grey. If the checkbox is disabled, it does not respond to user actions. The element cannot be focused and the command event will not fire. The element will still respond to mouse events. To enable the checkbox, leave the attribute out entirely as opposed to setting the value to false. The URL of the image to appear on the checkbox. If this is attribute is left out, no image appears. The position of the image is determined by the dir and orient attributes. The label that will appear beside the checkbox. If this is left out, no text appears. The labels on checkboxes will wrap if there is not enough space. Connects the checkbox to a corresponding preference. This attribute only has any effect when used inside a prefwindow. The preference should be a boolean type. The tab order of the element. The tab order is the order in which the focus is moved when the user presses the Tab key. Elements with a higher tabindex are later in the tab order sequence. Returns the accessibility object for the checkbox. Indicates whether the checkbox is checked or not. You can change the checked property to change the state of the checkbox. A CheckboxStateChange event will be sent to the element when the checkbox is changed either via the checked property or changed by the user. Returns true or false depending on the state of the checkbox. The checkbox may be checked or unchecked by setting this property.