In this example, we:

• Element

  In this example, the element

  The optional attributes of this tag are width \u003d "width" and height \u003d "height", and the required attribute is src \u003d "frame address".

  Tag attributes and properties

  1. Attribute COLS \u003d "Parameters"
  Specifies the number of vertical page breaks.

  2. Attribute ROWS \u003d "Parameters"
  Specifies the number of horizontal page breaks.

  Now let's look at how you can set the parameters of the split.

  a) Using the number, which will correspond to the number of pixels. For example, cols \u003d "100,100,300" splits the page into three areas, each of which will be in width: 100 pixels, 100 pixels, and 300 pixels, respectively.

  b) With interest from the total width / height. In the examples discussed above, we used exactly the percentage splitting, so it seems pointless to give an example.

  c) With * (asterisk). For example, cols \u003d "2 *, 3 *, 100" sets the first two regions to a 2: 3 ratio and the third region to be 100 pixels wide.

  All three methods can be combined. For example, cols \u003d "2 *, 100.15%, 4 *".

  3. Attribute frameborder \u003d "(yes | no)"
  Determines whether a frame has a border. If the answer is yes, then the next fourth border attribute is in effect.

  4. Attribute border \u003d "parameter"
  In pixels, border specifies the thickness of the stroke for the frame area. For example, frameborder \u003d "2" defines an area with a 2-pixel outline.

  5. Attribute bordercolor \u003d "color"
  Determines the color of the border, if any. The color can be set both by words and by code (see html color palette).

  Note: Please note that the tag need a closing tag .

  Tag attributes and properties

  1. Attribute src \u003d "item address"
  The full URL to the element address must be specified here as a parameter. This attribute is required. He is already familiar to you, tk. he was present in examples 1 and 2.

  2. Attribute marginwidth \u003d "number"
  Specifies the padding within the frame from the borders in pixels in width. For example, marginwidth \u003d "10" will set the content margin to the left and right of the frame border.

  3. Attribute marginhight \u003d "number"
  It is similar to the second one with the only difference that it sets the offset in height.

  4. Attribute scrolling \u003d "(yes | no | auto)"
  Specifies the ability to scroll the frame if it could not fit into the frame of the area allocated to it. The default is auto (which means to create a scroll if necessary).

  5. The noresize attribute
  If this attribute is set, then the user is prohibited from changing the frame boundaries on his own. By default, this attribute is not set and the user can change the boundaries as he wants.

  5. Attribute name \u003d "title"
  With this attribute, you can give the frame a name. This is necessary so that other frames can access this frame. Example # 2 is just such a case.

  Note:
  The name must not start with an underscore "_".

  6. Attributes frameborder, border and bordercolor
  These three attributes are the same as for frameset (see frameset attributes above).

  Advantages and disadvantages of frames

  Pros of frames

  • The ability to display several pages independently in one window (example 1 and 2 above);
  • The ability to switch page content without reloading the page (only one area of \u200b\u200bthe screen changes);
  • The ability to flexibly build a site structure (header, menu, footer, etc. - all static information is stored separately in files, and this allows you to quickly edit part of the site);
  • The user can change the size of the viewport himself if the noresize option is not set;

  Cons of frames

  • Search engines poorly index sites on frames, because they are unable to interpret the loaded files in frames. The search engine distinguishes pages by their address (URL), while frames, despite different states, do not change the page address. This is contrary to the rules of the search engine, which means that it is not a fact that the search engine will be able to index the site.
  • It is impossible to bookmark a site on frames, because Page url will be the same. Thus, one can only save the initial state frame.
  • Not all browsers support frames.

  The future of frames:
  Many webmasters have long been abandoning frames. This is due to the difficulties of promotion in search engines. Now everyone is switching to Ajax as a more dynamic and modern way of displaying information on one page of the site.

  Dear reader, we have reviewed tags html document regarding frames. Despite the dubious future of this direction, every webmaster should know about frames.

  One of the most common ways to infect a site visitor's computer is to exploit a vulnerability related to a user's browser buffer overflow. The recipe is simple enough. Attackers inject malicious code by inserting an iframe into website pages and try to download malicious files to the computer of an unsuspecting user. It is quite easy to detect such malicious inserts on your websites. One has only to pay attention to the code snippets that use the iframe connection. Such inserts can be in both HTML and PHP files.

  Attackers almost always try to hide the use of malicious bids from the owners as much as possible, hiding them visually for resource users and obfuscating (obfuscating) their code.

  Hiding iframe inserts from users' eyes

  To disguise a malicious insert, hackers in most cases use the same method over and over again - they set the properties of the tag so that it is not displayed on the page, but is contained in its code. Most often, zero or one-pixel width and length are set: width \u003d "1px", height \u003d "1px".

  For example, malicious code might look like this:

  However, hackers often do not limit themselves to such disguises, supplementing the concealment with more sophisticated techniques that can confuse and complicate search and elimination even for advanced programmers.

  Obfuscation

  This is one of the most common ways to protect code in programming in unstructured languages \u200b\u200b(such as, for example, PHP). In fact, all encryption consists in the very confusion / obfuscation of the code by changing the names of variables and other elements. As a result, it is quite difficult to recognize signs of malware in obfuscated code and is possible only by indirect signs of using explicitly special JS (JavaScript) functions used just for obfuscation: unescape, fromCharCode.

  However, the detection of obfuscated code on the site does not mean that it is unambiguously harmful or easy to eliminate. You need to understand that, firstly, attackers could obfuscate the code by capturing part of the site's working code. In this case, when you try to cut out the encrypted fragment, you risk collapsing your resource. Secondly, the obfuscated code may not be malicious, but only a consequence of the operation of your CMS or its individual components, as well as additional modules installed by you.

  In any case, if you come across suspicious obfuscated code, you need to act with the utmost care.

  Other signs of infection

  If you doubt whether the code you found is malicious, then you can try to analyze indirect signs. If you have a large number of files on your site, you can pay attention to the date and time last change files. If you are well aware of the scenarios for working with your CMS files, you can take a closer look at the files changed on the same date at the same time, or with changes occurring at the same time interval, for example, 1 second.

  In case you are an advanced programmer, you can write a script that checks for the presence of the type of insertions you have detected on all files on your site. If you are even more advanced, you can force the script to cut the inserts, however, you should always be careful.

  Alternative methods

  We recommend that you use the Virusdai service to remove malicious inserts, even if you are an advanced specialist. Our service not only contains many signatures by which it finds malicious codesbut also saves time! Plus, the cost of using Virusday for cleaning is likely to be much lower than paying for your own working hours. You will be able to detect and remove not only iframe inserts, but many other threats as well. You can probably find and automatically remove the threat that caused iframe inserts on your site, such as Shell.

  Virusday service team.

  Type

  Related entries:

  About the city of Elbrus Elbrus Cheget ski Ski resort "Elbrus Mountain Cheget Elbrus region where is Excursion to Elbrus, Cheget and Narzan glade, Elbrus region Where is the Elbrus ski resort The history of live television presentation Presentation "Computer viruses
  • Android
  • IT technologies
  • Auto-Moto
  • Administration
  • Questions
  • the Internet
  • Consultation
  • Beauty and health
  • mobile connection
  • Entertainment
  • Advice
  • Sum in excel

  New or popular

  • 

    Evgeny Viksna: we have serious ambitions. You saw them earlier

  • 

    Webcams El Gouna, Egypt Webcam El

  • 

    Large-scale video surveillance system of the Lukoil filling station network in five regions of Russia

  • 

    "Guarantee" has installed a high-resolution web-camera in the area of \u200b\u200bthe Mityaevsky bridge

  • 

    How to set up a camera in contact

  • 

    Live webcams: Lazarevskoe