Code after fixing the bug: jquery.combobox.js
The following is the parameter description:
* comboboxContainerClass
o Set the style name of the entire control (wrapped at the outermost)
* comboboxValueContainerClass
o Set the style name for displaying selected text and drop-down
* comboboxValueContentClass
o Set the display style of selected text
* comboboxDropDownClass
o Set the style of drop-down options
* comboboxDropDownButtonClass
o Set the style of the drop-down button
* comboboxDropDownItemClass
o Set the style of the drop-down option
* comboboxDropDownItemHoverClass
o The style when the mouse moves over the option
* comboboxDropDownGroupItemHeaderClass
o Set The style of optgroup ItemHeader
* comboboxDropDownGroupItemContainerClass
o Set the style of optgroup element
* animationType
o Set the style of animation effect, such as slide, hide(100), default slide
* width
o Control width
* height
o Control height
* onChange
o This event is triggered when the option changes and receives two parameters. The first one is selectedIndex. The second one is selectedValue
The following is a simple example: