Can use and to the style attributes - these options are equivalent. With the style attribute and null value of border specified in it the same code will look so: <href= "" / ""> When using the style attribute (0px) can replace null value with text ""none"" (without quotes). 2. If it is required to prevent emergence of a frame in all pictures with links placed in the page, then it is simpler to make it in one place of the HTML-code. For this purpose (between the tags and ) should place the description of styles of the page with the general rule for all links in a heading part of the document. It is possible to write this rule so: img {border: none; } it should be placed in the tag reporting to the browser that here the description of styles in the CSS language is placed: 3. If you use in the JavaScript-scripts page which perform any operations at click on the text reference without transition to other page, then after click in some browsers and around the text reference there is a similar dotted frame. To prevent also this unauthorized change of your design, add the corresponding rule for text references to CSS block descriptions of styles: