You can add borders to HTML scroll boxes using the CSS 'border' property. Borders can be of any thickness, and any color. You can specify whether it's solid, dotted, dashed, and more. You can also specify a different border for each side of your scroll box You can add borders to HTML scroll boxes using the CSS 'border' property. Borders can be of any thickness, and any color. You can specify whether it's solid, dotted, dashed, and more. You can also specify a different border for each side of your scroll box You can add borders to HTML scroll boxes using the CSS 'border' property. Borders can be of any thickness, and any color. You can specify whether it's solid, dotted, dashed, and more. You can also specify a different border for each side of your scroll box You can add borders to HTML scroll boxes using the CSS 'border' property. Borders can be of any thickness, and any color. You can specify whether it's solid, dotted, dashed, and more. You can also specify a different border for each side of your scroll box You can add borders to HTML scroll boxes using the CSS 'border' property. Borders can be of any thickness, and any color. You can specify whether it's solid, dotted, dashed, and more. You can also specify a different border for each side of your scroll box You can add borders to HTML scroll boxes using the CSS 'border' property. Borders can be of any thickness, and any color. You can specify whether it's solid, dotted, dashed, and more. You can also specify a different border for each side of your scroll box You can add borders to HTML scroll boxes using the CSS 'border' property. Borders can be of any thickness, and any color. You can specify whether it's solid, dotted, dashed, and more. You can also specify a different border for each side of your scroll box You can add borders to HTML scroll boxes using the CSS 'border' property. Borders can be of any thickness, and any color. You can specify whether it's solid, dotted, dashed, and more. You can also specify a different border for each side of your scroll box You can add borders to HTML scroll boxes using the CSS 'border' property. Borders can be of any thickness, and any color. You can specify whether it's solid, dotted, dashed, and more. You can also specify a different border for each side of your scroll box