A Mouseover or hover box refers to a GUI A graphical user interface is a type of user interface which allows people to interact with electronic devices such as computers; hand-held devices such as MP3 Players, Portable Media Players or Gaming devices; household appliances and office equipment with images rather than text commands. A GUI offers graphical icons, and visual indicators, as event In computer programming, event-driven programming or event-based programming is a programming paradigm in which the flow of the program is determined by events—i.e., sensor outputs or user actions or messages from other programs or threads that is raised when the user moves or "hovers" the cursor over a particular area of the GUI. The technique is particularly common in web browsers A web browser is a software application for retrieving, presenting, and traversing information resources on the World Wide Web. An information resource is identified by a Uniform Resource Identifier and may be a web page, image, video, or other piece of content. Hyperlinks present in resources enable users to easily navigate their browsers to where the URL In computing, a Uniform Resource Locator is a type of Uniform Resource Identifier (URI) that specifies where an identified resource is available and the mechanism for retrieving it. In popular usage and in many technical documents and verbal discussions it is often incorrectly used as a synonym for URI. In popular language, a URL is also referred of a hyperlink In computing, a hyperlink is a reference in a document to an external or internal piece of information. The most common usage is in the Internet to browse through web pages: some text in the current document is highlighted so that when clicked, the browser automatically displays another page or changes the current page to show the referenced can be viewed in the status bar A status bar, similar to a status line, is an information area typically found at the bottom of windows in a graphical user interface. A status bar is sometimes divided into sections, each of which shows different information. Its job is primarily to display information about the current state of its window, although some status bars have extra. Site designers Web design is the skill of creating presentations of content that is delivered to an end-user through the World Wide Web, by way of a Web browser or other Web-enabled software like Internet television clients, microblogging clients and RSS readers can easily define their own mouseover events using Javascript JavaScript is a scripting language used to enable programmatic access to objects within other applications. It is primarily used in the form of client-side JavaScript for the development of dynamic websites. JavaScript is a dialect of the ECMAScript standard and is characterized as a dynamic, weakly typed, prototype-based language with first-class[1] and Cascading Style Sheets Cascading Style Sheets is a style sheet language used to describe the presentation (that is, the look and formatting) of a document written in a markup language. Its most common application is to style web pages written in HTML and XHTML, but the language can be applied to any kind of XML document, including SVG and XUL.[2] In case of multiple layers the mouseover event is triggered by the uppermost layer.
Mouseover events are not limited to web design and are commonly used in modern GUI programming. Their existence might not even be known to the user as the events can be used to call any function In computer science, a subroutine or subprogram is a portion of code within a larger program, which performs a specific task and is relatively independent of the remaining code and might affect only the internal workings of the program.
Contents |
Tooltip
A special usage of mouseover event is a tooltip The tooltip is a common graphical user interface element. It is used in conjunction with a cursor, usually a mouse pointer. The user hovers the cursor over an item, without clicking it, and a small "hover box" appears with supplementary information regarding the item being hovered over showing a short description of the GUI object under the cursor. The tooltip generally appears only after the mouse is held over the object for a certain amount of time.
Examples
<!-- Direct usage not recommended | does not conform with web standards -->
<img id="myImage" src="/images/myImage.jpg" onMouseOver="alert('your message');">
// javascript without any framework
var myImg = document.getElementById('myImage');
function myMessage() {
alert('your message');
}
if(myImg.addEventListener) { //addEventListener is the standard method to add events to objects
myImg.addEventListener('mouseover', myMessage, false);
}
else if(myImg.attachEvent) { //for Internet Explorer
myImg.attachEvent('onmouseover', myMessage);
}
else { //for other browsers
myImg.onmouseover = myMessage;
}
// jQuery example | degrades well if javascript is disabled in client browser
$("img").mouseover(function(){
alert('your message');
});
References
External links
- Hidden CSS Menu—A multilevel mouseover-menu in pure CSS (i.e. no JavaScript)
Categories: Graphical user interface | Widgets Categories: Graphical user interface | User interface techniques
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The faster navigation features a pancake mouseover position marker. Double click the frosted pane and you can move as far as the eye can see. ...
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