fix(guide): simplify directory structure

guide/english/html/attributes/input-checked-attribute/index.md

@@ -0,0 +1,23 @@
+---
+title: Input Checked Attribute
+---
+## Input Checked Attribute
+
+The checked attribute is a boolean attribute.
+
+When present, it specifies that an <input> element should be pre-selected (checked) when the page loads.
+
+The checked attribute can be used with <input type="checkbox"> and <input type="radio">.
+
+The checked attribute can also be set after the page load, through JavaScript.
+
+## Take a look at the following example:
+```html
+<form action="/action_page.php">
+  <input type="checkbox" name="vehicle" value="Bike"> I have a bike<br>
+  <input type="checkbox" name="vehicle" value="Car" checked> I have a car<br>
+  <input type="submit" value="Submit">
+</form>
+```
+
+In the example above when the web page is loaded by default the first checkbox will come automatically selected due to the checked attribute.