in css when do you need to use the # when you are trying to identify an element in your html?

Hey Brandt-

It sounds like you are discovering the difference between class selectors and ID selectors. More information can be found here: http://www.w3schools.com/css/css_selectors.asp, but basically ID selectors are for single instances (say a single gallery you would like to target on your site i.e. 'wedding picture gallery' on a page full of galleries). The hash id selector can be used with more elements than just divs and galleries. The class selector looks similar but can target several elements at once based on 'scope,' or in other words, where your objects fall in the DOM (document object model) tree.

Also, a wrapper is a div named wrapper. You can have more than one div, but if you rename it wrapper you may run into trouble. We put the sites objects in a div (named wrapper) to contain them within the body so we can easily style all the content at once using CSS.

-Stephen

Hello Bradt.

You can use an ID with any element so if you give an ID attribute to an element it's selected by using # so the selector becomes an ID selector.

p id = "bold"></b>

p#bold {
    font-weight: bold;
}

Be aware though that once you use a particilar ID on one element you won't be able to use it on another. :-) Hope this helps

Hello Brandt.

#

means you are selecting according to the id of the element, and you are the one that sets the id of one element when creating the html (writing for example:

<div id="one"></div>.

So since the id has to be unique, you will get that specific element only when selecting it.

If you want to select multiple elements using only one css selector, you should probably opt for using a class in the html, and this can be the same for more than one element.

;)

Vittorio