arguments="argument_list"
Optional. This attribute specifies the comma-separated list of arguments to pass to the receiveArguments() function in a toolbar command file. If you do not specify the arguments attribute, Adobe Dreamweaver passes the ID of the toolbar item. In addition, pop-up menus, combo boxes, text boxes, and color pickers pass their current value as the first argument, before any arguments that the arguments attribute specifies, and before the item ID if no arguments are specified.
Example
On a toolbar that has Undo and Redo buttons, each button calls the menu command file, Edit_Clipboard.htm, and passes an argument that specifies the action, as shown in the following example:
<button id="DW_Undo" image="Toolbars/images/MM/undo.gif" disabledImage="Toolbars/images/MM/undo_dis.gif" tooltip="Undo" file="Menus/MM/Edit_Clipboard.htm" arguments="'undo'" update="onEveryIdle"/><button id="DW_Redo" image="Toolbars/images/MM/redo.gif" disabledImage="Toolbars/images/MM/redo_dis.gif" tooltip="Redo" file="Menus/MM/Edit_Clipboard.htm" arguments="'redo'" update="onEveryIdle"/>