object.style.columns = "value";
<'columns'> = <'column-width'> || <'column-count'>
<'column-width'> = auto | <length [0,∞]>
auto
Automatically specified by the user agent.
<length>
Specifies the length using a number followed by a unit of measurement.
<'column-count'> = auto | <integer [1,∞]>
auto
Automatically specified by the user agent.
<integer>
Specifies one or more decimal digits (0-9).