本文实例讲述了overlib用法。分享给大家供大家参考，具体如下：
overLIB 是一个生成提示框与弹出菜单等页面效果的一段非常优秀的JS代码。
它可以简单的通过设置一些参数或命令来改变弹出页面的款式、皮肤与形状,不但如此，它还提供了非常简单的扩展功能，来足客户的不同需求。
overLIB 使用非常的简单。
一、在<head></head> 标签内添加：
<script type="text/javascript" src="overlib.js"><!-- overLIB (c) Erik Bosrup --></script>
二、在<body></body>标签内添加：
<div id="overDiv" style="position:absolute; visibility:hidden; z-index:1000;"></div>4.10以上的版本可省略此步
三、生成两种不同款式(popup与sticky)的弹出页面
<a href="javascript:void(0);" onmouseover="return overlib('这是一个popup.');" onmouseout="return nd();">popup示例</a>
<a href="javascript:void(0);" onmouseover="return overlib('这是一个sticky',STICKY, MOUSEOFF);" onmouseout="return nd();">stick示例 </a>
四、 命令与参数
popup
Attribute Name
Type
Required
Default
Description
text
string
Yes
n/a
the text/html to display in the popup window
trigger
string
No
onMouseOver
What is used to trigger the popup window. Can be one of onMouseOver or onClick
sticky
boolean
No
false
Makes the popup stick around until closed
caption
string
No
n/a
sets the caption to title
fgcolor
string
No
n/a
color of the inside of the popup box
bgcolor
string
No
n/a
color of the border of the popup box
textcolor
string
No
n/a
sets the color of the text inside the box
capcolor
string
No
n/a
sets color of the box's caption
closecolor
string
No
n/a
sets the color of the close text
textfont
string
No
n/a
sets the font to be used by the main text
captionfont
string
No
n/a
sets the font of the caption
closefont
string
No
n/a
sets the font for the "Close" text
textsize
string
No
n/a
sets the size of the main text's font
captionsize
string
No
n/a
sets the size of the caption's font
closesize
string
No
n/a
sets the size of the "Close" text's font
width
integer
No
n/a
sets the width of the box
height
integer
No
n/a
sets the height of the box
left
boolean
No
false
makes the popups go to the left of the mouse
right
boolean
No
false
makes the popups go to the right of the mouse
center
boolean
No
false
makes the popups go to the center of the mouse
above
boolean
No
false
makes the popups go above the mouse. NOTE: only possible when height has been set
below
boolean
No
false
makes the popups go below the mouse
border
integer
No
n/a
makes the border of the popups thicker or thinner
offsetx
integer
No
n/a
how far away from the pointer the popup will show up, horizontally
offsety
integer
No
n/a
how far away from the pointer the popup will show up, vertically
fgbackground
url to image
No
n/a
defines a picture to use instead of color for the inside of the popup.
bgbackground
url to image
No
n/a
defines a picture to use instead of color for the border of the popup. NOTE: You will want to set bgcolor to "" or the color will show as well. NOTE: When having a Close link, Netscape will re-render the table cells, making things look incorrect
closetext
string
No
n/a
sets the "Close" text to something else
noclose
boolean
No
n/a
does not display the "Close" text on stickies with a caption
status
string
No
n/a
sets the text in the browsers status bar
autostatus
boolean
No
n/a
sets the status bar's text to the popup's text. NOTE: overrides status setting
autostatuscap
string
No
n/a
sets the status bar's text to the caption's text. NOTE: overrides status and autostatus settings
inarray
integer
No
n/a
tells overLib to read text from this index in the ol_text array, located in overlib.js. This parameter can be used instead of text
caparray
integer
No
n/a
tells overLib to read the caption from this index in the ol_caps array
capicon
url
No
n/a
displays the image given before the popup caption
snapx
integer
No
n/a
snaps the popup to an even position in a horizontal grid
snapy
integer
No
n/a
snaps the popup to an even position in a vertical grid
fixx
integer
No
n/a
locks the popups horizontal position Note: overrides all other horizontal placement
fixy
integer
No
n/a
locks the popups vertical position Note: overrides all other vertical placement
background
url
No
n/a
sets image to be used instead of table box background
padx
integer,integer
No
n/a
pads the background image with horizontal whitespace for text placement. Note: this is a two parameter command
pady
integer,integer
No
n/a
pads the background image with vertical whitespace for text placement. Note: this is a two parameter command
fullhtml
boolean
No
n/a
allows you to control the html over a background picture completely. The html code is expected in the "text" attribute
frame
string
No
n/a
controls popups in a different frame. See the overlib page for more info on this function
timeout
string
No
n/a
calls the specified javascript function and takes the return value as the text that should be displayed in the popup window
delay
integer
No
n/a
makes that popup behave like a tooltip. It will popup only after this delay in milliseconds
hauto
boolean
No
n/a
automatically determine if the popup should be to the left or right of the mouse.
vauto
boolean
No
n/a
automatically determine if the popup should be above or below the mouse.
overLIB 可以接受任意个命令和参数。格式如下：命令[,'命令参数']
<a href="javascript:void(0);" onclick="return overlib('This is a sticky with a caption. And it is centered under the mouse!', STICKY, CAPTION,
'Sticky!', CENTER);" onmouseout="nd();">Click here!</a>
五、 overlib的一些使用示例
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<scriptlanguage="JavaScript" src="overlib.js"></script><html>
<head>
<metahttp-equiv="Content-Type" content="text/html; charset=gb2312">
<title>无标题文档</title>
</head>
<body>
<ahref="#" onclick="return overlib('使用overlib的命令', CAPTION, '这是Caption命令，就是生成头部',HAUTO);"" onmouseout="return nd();">弹出测试</a>
<ahref="javascript:void(0);" onmouseover="return overlib('This is an ordinary popup.',CLOSECLICK);" onmouseout="return nd();">here</a>
<ahref="javascript:void(0);" onmouseover="return overlib('This is what we call a sticky, since I stick around (it goes away if you move the mouse OVER and then OFF the overLIB popup--or mouseover another overLIB).', STICKY, MOUSEOFF);" onmouseout="return nd();">吸附性的提示框</a>
<ahref="javascript:void(0);" onclick="return overlib('This is a sticky with a caption. And it is centered under the mouse!', STICKY, CAPTION,'Sticky!',CENTER);">含CAPTION的STICKY!</a>
<ahref="javascript:void(0);" onclick="return overlib('Setting size and posiztion!', STICKY, CAPTION,'Sticky!',HEIGHT, 100,WIDTH,120,LEFT);">指定大小与位置弹出</a>
<ahref="javascript:void(0);" onclick="return overlib('Setting size and posiztion!', STICKY, CAPTION,'Sticky!',STATUS ,'Hello');">设置状态栏</a>
</body>
</html>
六、自定义overlib。overlib有三种方式可以实现自定义。
1、我们上面用过的通过输入不同命令来实现自定义。
2、修改overlib.js中的默认值来实现自定义
3、在引用的页面指定变量来实现自定义。
overlib点击此处本站下载。
希望本文所述对大家JavaScript程序设计有所帮助。