border-bottom-style, border-left-style, border-right-style, border-style, border-top-style attribute

Type:"solid", "dotted", "dashed", "dotted-narrow", "dotted-wide", "dashed-narrow", "dashed-wide"
Inherited:no
Used By:All block elements
Default:"solid", except for INPUT elements (which use "bevel"
See:border line-cap line-join

Sets the border style for the borders on the block. All the borders can be set at once using the border-style attribute, or an individual side can be set by using border-style-left, border-style-RIGHT, border-style-top or border-style-BOTTOM.

The various values are:
soliddraw a solid border
dotteddraw a dotted border
dotted-narrowdraw a dotted border with the dots closer together than plain dotted
dotted-widedraw a dotted border with the dots further apart than plain dotted
dasheddraw a dashed border
dashed-narrowdraw a dashed border with the dashes closer together than plain dashed
dashed-widedraw a dashed border with the dots further apart than plain dashed
insetdraw a border that appears to be inset into the page (input elements only)
beveldraw a border that appears to have beveled edges (input elements only)
The dash pattern can also be set manually by setting the value to (on, off, phase), where on is the length of the dash, off is the length of the space between dashes and phase is how far in to the pattern to start.

This causes circles to be drawn with a dotted outline, divs to be drawn with a line of 5pt followed by a gap of 10pt, and for form elements to be drawn with a "beveled" feel (the default).

circle  { border-style: dotted; }
div     { border-style:(5,10,0); }
input   { border-style:bevel; }