fontFamily:
a style sheet property ( STYLE tag), or a style property inside a tag (STYLE attribute). Specifies the font family.
arial 'arial narrow'
font-family:
family font family name (New York)
genus generic name (Serif)
Several fonts are installed in order of priority listing families and genders and separated by a space, the last should be the genus. A limited number of fonts are specified in the list; however, you can use other fonts. To do this, after inserting the tag into the text, change the inserted font to the required one.