Hi I recently added a 404 page to a website found here:  The id "greywrap" already existed and CSS detects styles fine, but then I added "404" "404title" and "404subtitle" classes and added to the stylesheet but they are not applying. This could be just a simple stupid mistake, but having a hard time finding it. Thanks in advance for any help!  HTML          &lt;div id="greywrap" class="404"&gt;         &lt;img src="http://www.webfounded.com/blog/wp-content/themes/ward/library/images/404.png"/&gt;         &lt;h1 class="404title"&gt;404 Error&lt;/h1&gt;         &lt;p class="404subtitle"&gt;Sorry. We can't seem to find the page you're looking for.&lt;/p&gt;     &lt;/div&gt;   CSS  .404 {     padding: 70px 0 60px; }  .404title {     margin-top: 100px;     font-size: 72px;     line-height: 1.2;     text-transform: uppercase; }  .404subtitle {     font-size: 38px;      text-transform: uppercase; }
What characters/symbols are allowed within the CSS class selectors? I know that the following characters are invalid, but what characters are valid?  ~ ! @ $ % ^ &amp; * ( ) + = , . / ' ; : " ? &gt; &lt; [ ] \ { } | ` #
How to create a SQL Server function to "join" multiple rows from a subquery into a single delimited field? What is the relationship between lands and mana in Magic and what do each of them do?  A good answer should especially include how a new player should think about them.    Note:  This is an attempt to create a canonical question about the relationship between lands and mana in Magic.  Beginners are often confused about this given the same symbols are used to mean different things across basic lands, non-basic lands, and mana costs.  This can lead to confusion about , about , or even about . How can I swap or replace multiple strings in code at the same time? My network includes machines running Linux and others running Windows. And my machine is running Linux. Alternating sum of binomial coefficients multiplied by (1/k+1) I'm trying to prove that  $$\sum_{k=0}^n {n \choose k} (-1)^k \frac{1}{k+1} = \frac{1}{n+1}$$  So far I've tried induction (which doesn't really work at all), using well known facts such as  $$\sum_{k=0}^n {n \choose k} (-1)^k = 0$$  and trying to apply identities like  $${n \choose k} = {n-1 \choose k-1} + {n-1 \choose k}$$  Would anyone be able to point me towards the right method? Should I be looking to apply an identity or is there a method I'm missing? How to delete Windows.old in Windows 8 It seems to be a common thing that a Windows Update creates a Windows.old folder under C:\Windows.old My question is now, can it be deleted with Windows 8 and how can I do that?  If I try to manually delete it in Windows Explorer it does not let me, a permissions issue. Possible Duplicate:          Sounds like a silly question, but bear with me..  If you go into Peet's Coffee and access the wifi, you're taken to a web page that requires a 4-digit code you get with a purchase.   If you do the same at Starbucks you're taken to a page and asked to OK the terms of service.   I want to build something similar for a local independent coffee shop, something that requires the user to write a little about themselves before they can access the Internet.  I'm not sure which way to go -- looking for wifi routers that run an internal web server, or finding one that lets you direct users to an external website for authentication, somehow redirecting back to the access point once successful.   Has anyone done anything like this and can share their experience? When do you use Java's @Override annotation and why? Instead of relying on my host to send an email, I was thinking of sending the email messages using my Gmail account. The emails are personalized emails to the bands I play on my show.   Is it possible to do it? Simplifying the integral $\int\frac{dx}{(3 + 2\sin x - \cos x)}$ by an easy approach Is it possible to use an Ubuntu Live CD and run GParted to partition a my HDD (including the partition that is usually mounted on a given system)? I'm encountering a problem with my HDD's partitions and can't resize it. I've described my problem and my system here: .  Now, from a more general perspective, I was thinking on whether it is possible to use an Ubuntu Live CD and use GParted in a live session to possibly go around that problem. Is that possible? I made a separate question as I'm interested in the possibility independently from my current problem.  You see, I only have one partition and that's mounted. When I use GParted through Ubuntu I don't get any error reports (unlike the case reported in the question linked above).  Thanks beforehand. Show bigger amplitude of physical pendulum means bigger period Suppose you have a physical . It is true that as amplitude increases, the period increases. Can we demonstrate this fact without explicitly finding the period (which is pretty involved and pretty messy) in:    an intuitive fashion,  rigorously? Expected maximum of sub-Gaussian I'm trying to answer the following question from the book :  Let $X_1,X_2,\dots$ be a sequence of sub-gaussian random variables, which are not necessarily independent. Show that   $E\bigg[ \max_i \frac{|X_i|}{\sqrt{1 + \log i}} \bigg] \le CK$,  where $K = \max_i \|X_i\|_{\psi_2}$. Deduce that for ever $N \ge 2$ we have   $E\bigg[ \max_{i \le N} |X_i| \bigg] \le CK \sqrt{\log N}$.  I've tried to figure out what is the distribution of the maximum of Gaussians, but I'm reaching only inequalities that that don't help me answer the question.   I've also seen a similar question .  Does anyone have a clue or something to start with in order to answer this question?  Thanks! I am fascinated by the way the CLR and GC works (I'm working on expanding my knowledge on this by reading CLR via C#, Jon Skeet's books/posts, and more).  Anyway, what is the difference between saying:  MyClass myclass = new MyClass(); myclass = null;   Or, by making MyClass implement IDisposable and a destructor and calling Dispose()?  Also, if I have a code block with a using statement (eg below), if I step through the code and exit the using block, is the object disposed of then or when a garbage collection occurs? What would happen if I call Dispose() in the using block anyay?  using (MyDisposableObj mydispobj = new MyDisposableObj()) {  }   Stream classes (eg BinaryWriter) have a Finalize method? Why would I want to use that? How to theme the maintenance mode page? What would be the best practice for theming the maintenance mode page in Drupal 7? GNOME: disable sleep on lid close Is it possible to stop my laptop going to sleep when I close the lid?  GNOME 3.20, Fedora 24.    My laptop does not reliably wake from sleep.  (It happens to be a hardware issue... I think I basically killed it while trying to replace a wifi card.  But I want to keep using it for a while longer). Disable auto-opening nautilus window after auto-mount Every time I plug a USB stick in, nautilus opens a new window with the contents of the drive. I would like to disable this auto-opening of the nautilus window, but I would like the actual auto-mount to keep working. Is this possible? Any ideas how to display a PDF file in a WPF Windows Application?     I am using the following code to run the browser but the Browser.Navigate method does not do anything!  WebBrowser browser = new WebBrowser(); browser.Navigate("http://www.google.com"); this.AddChild(browser); // this is the System.Windows.Window Continuing example in Beamer Keep values selected after form submission