Styles you can use with JavaScript

fontFamily
fontStyle
fontVariant
fontWeight
fontSize
font
color

background
backgroundColor
backgroundImage
backgroundRepeat
backgroundAttachment
backgroundPosition
backgroundPositionX
backgroundPositionY

wordSpacing
letterSpacing
textDecoration
textDecorationNone
textDecorationUnderline
textDecorationOverline
textDecorationLineThrough
textDecorationBlink

verticalAlign
textTransform
textAlign
textIndent
lineHeight

marginTop
marginRight
marginBottom
marginLeft
margin

paddingTop
paddingRight
paddingBottom
paddingLeft
padding

border
borderTop
borderRight
borderBottom
borderLeft
borderColor
borderTopColor
borderRightColor
borderBottomColor
borderLeftColor
borderWidth
borderTopWidth
borderRightWidth
borderBottomWidth
borderLeftWidth
borderStyle
borderTopStyle
borderRightStyle
borderBottomStyle
borderLeftStyle

width
height
styleFloat
clear
display
visibility

listStyleType
listStylePosition
listStyleImage
listStyle

whiteSpace
top
left
position
zIndex
overflow

pageBreakBefore
pageBreakAfter

cssText

pixelTop
pixelLeft
pixelWidth
pixelHeight

posTop
posLeft
posWidth
posHeight

cursor
clip
filter