The getButtonURL(...) function has only three variations, not counting syntax variations.  It generates a URL which corresponds to a dynamically generated button with any text you'd like and one of many predefined styles.  It can also optionally rotate the button to make vertical text.

Syntax:
getButtonURL( label )
getButtonURL( label, style )
getButtonURL( label, style, transform-type )
label.getButtonURL( )
label.getButtonURL( style )
label.getButtonURL( style, transform-type )

Parameter	Description
label	The String to use as the label. This may also be a BlueStep id. If so, the name of the object corresponding to the BlueStep id will be used as the button label in place of the id.
style	The button style to use. Examples of each button type are listed here with the style name on the button face: , , , , , , , , , , , , , , , ,
transform-type	An optional transform type which allows for rotated buttons and other types of transforms described in the article titled Image Transformations.

B.buttonUrl()