Parameters:

Parameter Type Default value Description, format
HRef string "" URL location
Target string "_self" Target frame: "_self","_blank","_top","main","your_own_frame_name"
Text string "" "ButtonText | h.alignment | x | y | font name | font size | font style | text color | shadow color | shadow size|ouline_size" - text and its attributes
Default values are bold:
h.alighment -- "left" or "right", x - defines offset from the the margin
x --"-1","0","1"...., if x== -1 then text is centered horizontally
y --"-1","0","1"...., if y== -1 then text is centered vertically
font name -- "Arial", "Times New Roman", etc.
font style -- "plane", "italic", "bold", "bold italic"
text color -- "black", "red", #FF00DD, etc. (see remark after this table)
shadow color - "grey", etc.
shadow size -- "1,0,2,..."
outline size -- "0,1,2"
Text2 sting $Text The same parameters for the text to be displayed on the button when the mouse is over
Image1, Image3,5,7,9,11 string "" "image | x | y | state " - reference to the images to be displayed in the normal state
state -- "both", "active", "passive"  - can be set for tab buttons
Image2, Image4,6,8,10,12 string $Image1 Reference to the images to be displayed on the button when the mouse is over
Background string null "background image|background color" - Image and color that will be used for filling background.
Sound, Sound2 string null Sounds to be played when entering or clicking the button
Effect1,..3,..5,..7,..9 string null "Effect name|param1|param2..." - effects to be applied for normal state 
Effect2,..4,..6,..8,..10 string null "Effect name|param1|param2..." - effects to be applied for mouse over state
Status string null String to be displayed on the status bar 
UpdateTime string 50 Update frequency for animated colors and tab buttons
Group string null "group | initial_state", sets group for tab buttons (0...9) and initial state (active/passive)
UserFont string null "source image | density | height | y_offset | x_offset"
Counter1, ..., Counter4 string null "path_to_counter_script | when_load | probability | x | y"
Copyright string preset Should be set to "(c) Danilo Kozub, 2000-2001, http://DanKozub.com, mail@DanKozub.com"

REM: Colors can be set by following string constants: "red", "green",  "blue", "pink", "orange", "magenta", "cyan", "white", "yellow", "gray", "grey", "black", "darkGray", "lightGray" of hex expressions like "#FF0000".
From the version 1.2 you can use string constants with modificators: "blue-"- darker version of blue, "magenta+" - brighter version of "magenta"
From the version 1.3 you can use string constants with modificators: "[color] [+/-] [n]" where n=0-100, i.e [blue-50] darker version of blue, color+100=white, color-100=black, color+50=(color+white)/2 , etc.

Sounds should be in "AU" format. Animated gifs can be used as parameters.