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home / documentation / reference / buttonclassover

ButtonClassOver

Description:
The CSS class name that should be applied to this menu item button when the mouse hovers over it.

Value:
String, "", or JavaScript expression that returns a string/"". ButtonClassOver should match an existing class name in a user-defined CSS style sheet elsewhere on the HTML page.

Applies To:
Menu Items.

Browser Compatibility:
ButtonClassOver is not supported in Netscape 4.x or Internet Explorer 4.x.

Comments:
ButtonClassOver, along with the menu, item, and other button specific class name configuration parameters, allows you to supply basic stylings for your menus (such as font families and sizes, and background/foreground color schemes) via CSS style sheets external to HierMenus. To use ButtonClassOver, you must first define a class in your style sheets. You can then apply that class name to your menu items using the ButtonClassOver configuration parameter.

Defining style sheet classes is well beyond the scope of HierMenus documentation. For further information pertaining to style sheet rules and available parameters, we refer you to the W3C's Style Sheet section.

Most dimensioning parameters, including width and height, should not be included in your CSS button class definition. If you use these, the results will generally be undesirable (or they will just be ignored by HierMenus). Unlike the ItemClass and MenuClass settings, however, you may utilize border and padding widths in your button classes. It is, however, strongly recommended that your ButtonClass, ButtonClassOver, and ButtonClassSelected definitions all share the same dimensioning, such as font sizes, border, and padding widths. HierMenus does not resize menus when class names are swapped on menu items; if the individual over and selected states of the menu item are of differing dimensions the menu items may appear distorted when they are rolled over.

Special care must be taken when using classes with HierMenus to ensure that HM's own configuration parameters, which are considered to be more specific than class name assignments, do not override your style sheet settings. For further details view the Using Classes mini-tutorial.

ButtonClassOver is assigned to the menu item button when the mouse hovers over it. It is also assigned to a menu item button permanently if the menu item's IsPermHilite configuration parameter is set to true. By altering your color schemes in your ButtonClass and ButtonClassOver settings, you can control the mouseover effect of your menu items entirely via style sheet settings.

ButtonClassOver is case sensitive.

Examples:
// Ok:
ButtonClassOver:"hm_buttonover",
ButtonClassOver:"",    // remove over class for this item
ButtonClassOver:(window.useClasses)?"hm_buttonover":"",
   // if the user defined variable "useClasses" is
   // true, use the classname hm_buttonover

// Incorrect:
ButtonClassOver:hm_buttonover,      // quotes required
ButtonClassOver:'(window.useClasses)?"hm_buttonover":""',
   // no quoted expressions
Default:
""

See Also:
MenuClass, ItemClass, ItemClassOver, ItemClassSelected, ButtonClass, ButtonClassSelected, Using Classes Mini-Tutorial

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Created: 3/25/2004
Updated: 3/25/2004
URL: http://www.hiermenuscentral.com/documentation/reference/buttonclassover.html