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Appendix D:
JavaScript
Objects,
Properties,
Methods,
Event
Handlers
Appendix E:
JavaScript
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Elements,
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Appendix F:
Cascading
Style Sheets
 | | | Online Companion Home  Appendix D: Main
Appendix D
JavaScript Objects, Properties,
and Methods
The following are some of the more important JavaScript objects, properties,
and methods. The two columns at the right indicate the earliest Netscape and
Internet Explorer versions that support these JavaScript commands. For example,
a version number of "4.0" for Internet Explorer indicates that versions of
Internet Explorer 4.0 and above support the tag or attribute.
Many objects should be referred to by their names within the Web document.
For example, to apply the click() method to a button named "RUN," use the JavaScript command:
RUN.click();
A
Anchor, Applet, Area, Array
| JavaScript Elements | Description | IE | Netscape |
Anchor
|
An anchor in the document (use the anchor's name) |
4.0 |
4.0 |
- Properties
|
|
|
|
- name
| The name of the anchor
|
4.0 |
4.0 |
- text
| The anchor text |
|
4.0 |
|
| JavaScript Elements | Description | IE | Netscape |
Applet | A Java applet in the document (use the applet's name)
|
4.0 | 3.0 |
- Properties
|
|
|
|
- name
| The name of the applet |
|
3.0 |
|
| JavaScript Elements | Description | IE | Netscape |
Area | An area defined in an image map (use the area's name) | 3.0 |
3.0 |
- Properties
|
|
|
|
- hash
| The anchor name from the URL | 3.0 |
3.0 |
- host
| The host and domain name from the URL | 3.0 |
3.0 |
- hostname
| The hostname from the URL | 3.0 |
3.0 |
- href
| The entire URL | 3.0 |
3.0 |
- pathname
| The pathname from the URL | 3.0 |
3.0 |
- port
| The port number from the URL | 3.0 |
3.0 |
- protocol
| The protocol from the URL | 3.0 |
3.0 |
- search
| The query portion from the URL | 3.0 |
3.0 |
- target
| The TARGET attribute of the <AREA> tag | 3.0 |
3.0 |
- Methods
|
|
|
|
- getSelection()
| Returns the value of the current selection |
|
3.0 |
- Event Handlers
|
|
|
|
- onDblClick()
| Runs when the area is double-clicked
|
4.0 |
4.0 |
- onMouseOut()
| Runs when the mouse leaves the area | 3.0 |
3.0 |
- onMouseOver()
| Runs when the mouse enters the area | 3.0 |
3.0 |
|
| JavaScript Elements | Description | IE | Netscape |
Array | An array object | 3.0 |
3.0 |
- Properties
|
|
|
|
- length
| The number of elements in the array | 3.0 |
3.0 |
- prototype
| A mechanism to add properties to an array object | 3.0 |
3.0 |
- Methods
|
|
|
|
- concat(array)
| Combines two arrays, storing the results in a third array named
array
|
4.0 |
4.0 |
- join(string)
| Stores each element, separated by commas, in a text string named
string | 3.0 |
3.0 |
- reverse()
| Reverses the order of the array | 3.0 |
3.0 |
- pop()
| "Pops" the last element off the array and reduces the length of
the array by 1 |
|
4.0 |
- push(arg1,
arg2, ...)
| "Pushes" the elements in the list to the end of the array |
|
4.0 |
- slice(array,
begin, end)
| Extracts a portion of the array starting at the index number begin,
and ending at index number end; the elements are then stored in
array
|
4.0 |
4.0 |
- sort(function)
| Sorts the array based on the function named function; if
function is omitted, the sort applies dictionary order to the array | 3.0 |
3.0 |
|
| |
