| Parameter | Description
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| caption | Button Caption
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| image | Button Image. The image parameter can specify a link to a ico,bmp,jpeg, or gif format file. Icon functions can also be used to assign system icon.
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| action | Action to take whethe button is clicked. This can be a URL or one or more functions separated by semicolons.
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| default | Set the value to 1 to make it the default button. This is only used by the Search() function when one more search commands are defined in the one toolbar.
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| tooltip | Button tooltip. The value of the tooltp parameter is display when the mouse hovers over the button.
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| style | Button style. Can have one of the following values:
dropdown - Adds a dropdown
check - check button. A button with this style when clicked stays in the on position.
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| hidden | Specifies whether the button is hidden. Possible values are:
0 - Button is visible (default)
1 - Button is hidden
2 - Button is always hidden. If a button is always hidden, it can not be displayed through the customize toolbar dialog.
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| hidecaption | A value of 1 indicates that only the button image will be displayed without the caption.
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| hidechevron | If true, the button will not be displayed in the RHS chevron menu. The default value is zero. (requires v2.4.1 or later)
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| cache | Cache timeout in hours.
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| onbeginload | Commands to execute when a new page is about to be loaded.
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| onload | Commands to execute when new page finishes loading.
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| onchage | Command to execute when the control's value changes
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