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how to crop image in to pieces programmatically JavaScript object: access variable property by name as string Help with Dual Javascript countdown clock I am having a little trouble figuring out how to make this work properly, I am trying to put a small countdown clock in the left column and one in the right column, which will show a countdown to two separate dates. I was able to create a single countdown clock using the below code and was hoping to be able to be able to tweak the code enough to allow it to run on a second CEWP with a different date. Is it possible to run two Javascript files on the page without them interferring with eachother? Thank you anyone that can lend a quick hand.      &lt;style type="text/css"&gt; .container{     text-align: center;     background: #f63536;   font-family: sans-serif;   font-weight: 100;   height:115px;   width:215px; }  h3{   color: #FFFFFF;   font-weight: 100;   font-size: 16px;   margin: 0px 0px 5px;   padding-top:3px; }  #clockdiv{     font-family: sans-serif;     color: #fff;     display: inline-block;     font-weight: 100;     text-align: center;     font-size: 20px; }  #clockdiv &gt; div{     padding: 5px;     border-radius: 3px;     background: #ff5b5b;     display: inline-block; }  #clockdiv div &gt; span{     padding: 5px;     border-radius: 3px;     background: #ab0202;     display: inline-block; }  .smalltext{     padding-top: 5px;     font-size: 13px; }  &lt;/style&gt;  &lt;div class="container"&gt;  &lt;h3&gt;Countdown Clock Left&lt;/h3&gt; &lt;div id="clockdiv"&gt;   &lt;div&gt;     &lt;span class="days"&gt;&lt;/span&gt;     &lt;div class="smalltext"&gt;Days&lt;/div&gt;   &lt;/div&gt;   &lt;div&gt;     &lt;span class="hours"&gt;&lt;/span&gt;     &lt;div class="smalltext"&gt;Hrs.&lt;/div&gt;   &lt;/div&gt;   &lt;div&gt;     &lt;span class="minutes"&gt;&lt;/span&gt;     &lt;div class="smalltext"&gt;Min.&lt;/div&gt;   &lt;/div&gt;   &lt;div&gt;     &lt;span class="seconds"&gt;&lt;/span&gt;     &lt;div class="smalltext"&gt;Sec.&lt;/div&gt;   &lt;/div&gt; &lt;/div&gt;&lt;/div&gt;  &lt;script&gt; function getTimeRemaining(endtime){   var t = Date.parse(endtime) - Date.parse(new Date());   var seconds = Math.floor( (t/1000) % 60 );   var minutes = Math.floor( (t/1000/60) % 60 );   var hours = Math.floor( (t/(1000*60*60)) % 24 );   var days = Math.floor( t/(1000*60*60*24) );   return {     'total': t,     'days': days,     'hours': hours,     'minutes': minutes,     'seconds': seconds   }; }  function initializeClock(id, endtime){   var clock = document.getElementById(id);   var daysSpan = clock.querySelector('.days');   var hoursSpan = clock.querySelector('.hours');   var minutesSpan = clock.querySelector('.minutes');   var secondsSpan = clock.querySelector('.seconds');    function updateClock(){     var t = getTimeRemaining(endtime);      daysSpan.innerHTML = t.days;     hoursSpan.innerHTML = ('0' + t.hours).slice(-2);     minutesSpan.innerHTML = ('0' + t.minutes).slice(-2);     secondsSpan.innerHTML = ('0' + t.seconds).slice(-2);      if(t.total&lt;=0){       clearInterval(timeinterval);     }   }    updateClock();   var timeinterval = setInterval(updateClock,1000); }  var deadline = 'October 31 2015 00:00:50'; initializeClock('clockdiv', deadline); &lt;/script&gt; Python analog of PHP's natsort function (sort a list using a "natural order" algorithm) Trying to show that $\ln(x) = \lim_{n\to\infty} n(x^{1/n} -1)$ How do I reboot a Ubuntu Server from the command line? sudo reboot now never seems to work for me. Because its a server, I don't have a window manager installed, so I can't do it from a GUI (which always seems to work).    I've had the problem for years on different versions of the operating system. It happens in virtual machines and on real metal. The same problem exists with sudo shutdown now, too.  I've lived with it in the past. The difference now is I don't want to just hit the power button because I might lose data. Best way to hide a window from the Alt-Tab program switcher? I've been a .NET developer for several years now and this is still one of those things I don't know how to do properly. It's easy to hide a window from the taskbar via a property in both Windows Forms and WPF, but as far as I can tell, this doesn't guarantee (or necessarily even affect) it being hidden from the Alt+↹Tab dialog. I've seen invisible windows show up in Alt+↹Tab, and I'm just wondering what is the best way to guarantee a window will never appear (visible or not) in the Alt+↹Tab dialog.  Update: Please see my posted solution below. I'm not allowed to mark my own answers as the solution, but so far it's the only one that works.  Update 2: There's now a proper solution by Franci Penov that looks pretty good, but haven't tried it out myself. Involves some Win32, but avoids the lame creation of off-screen windows. I've followed this tutorial to install Ubuntu 15.10:    After restarting my computer I got to the grub menu and chose Ubuntu. Shortly after that I got this error:  /run/lvm/lvmetad.socket: connect failed: No such file or directory WARNING: Failed to connect to lvmetad. Falling back to internal scanning.   These messages keep adding up on a black screen every second. After a while,  I get access to the initramfs ash console.  what am I doing wrong? Which is the best way to put function plots into a LaTeX document? C++ single template specialisation with multiple template parameters Show that not all 5 cycles in $A_5$ are conjugate in $A_5$ This is a practice question (not assignment). One thing I am wondering is what this question exactly means. From my understanding, the conjugate of $a \in A_5$ is $gag^{-1} \in A_5$ where $g \in A_5$. I was trying to look at a similar question here on MSE and someone mentioned $(12345) \in A_5$ is not conjuagte in $A_5$. So does that means there exists a $g \in A_5$ such that $g(12345)g^{-1} \notin A_5$ (I am guessing this is incorrect since $A_5$ is a group). I am also away of the property that $g(12345)g^{-1} = (g(1)g(2)g(3)g(4)g(5))$. Let $(x_n)$ be a sequence of real numbers.  Prove that if there exists $x$ such that every subsequence $(x_{n_k})$ of $(x_n)$ has a convergent (sub-)subsequence $(x_{n_{k_l}})$ to $x$, then the original sequence $(x_n)$ itself converges to $x$ .              Thanks for any help. Let $(X,d)$ be a metric space and let $S$ be the set of Cauchy sequences in $S$. Define "~" in $S$ by "$\{s_k\}$ ~ $\{t_k\}$" to mean that $d(s_k,t_k) \to 0$ as $k \to \infty$. Let $X'$ denote the set of equivalence classes of $S$ and let $s'$ denote the equivalence class of $s = \{s_k\}$.   I know $\phi(s',t') = \lim\limits_{k \to \infty} d(s_k,t_k)$ is a metric on $X'$.   Show $(X',\phi)$ is complete.  For $x \in X$, define $x'$ to be the equivalence class of the constant sequence ${x,x,...}$. Show that the function $x \to x'$ is an isometry of $X$ onto a dense subset of $X$.   If anyone can share a proof, or steer me in the right direction, maybe tell me what it is that I need to prove specifically, that would be great. I have a program in which I've lost the C++ source code.  Are there any good C++ decompilers out there?  I've already ran across . When is logistic regression solved in closed form? How do I get the path of the directory in which a  script is located, inside that script? I want to use a Bash script as a launcher for another application. I want to change the working directory to the one where the Bash script is located, so I can operate on the files in that directory, like so: $ ./application So, @AndrewO mentioned recently that he has had 'encounters' with people wondering why D-Wave has a lot more qubits than IBM. Of course, this comparison is faulty, since the IBM and D-Wave's machine may both exploit quantum effects to a certain degree, IBM's machine matches the thing the TCS people call a 'Quantum computer' a bit more than D-Waves's alleged quantum annealer.   How do you explain to a novice why IBM is still reaching important milesstones, even though the D-Wave has a lot more 'qubits'. I understand that an easy answer is, 'well, you're comparing apples and pears', but that is merely relying on your possible authority and simply doesn't explain anything!   How can you explain that those devices are different, how can you dispell the myth that the number of qubits is not the only metric to judge quantum devices? (preferably to a layman, but assuming basic (undergrad?) physics knowledge is ok, if needed) Is “of ” necessary in “all of ”? Listen to all your fans   Name all the states   vs      Listen to all of  your fans   Name all of  the states   What part of language is of  in these examples? Is it necessary or optional, correct or incorrect? We're trying to debug some applications performing broadcast.  What is the difference between the broadcast address 255.255.255.255 and as e.g. reported by ifconfig,  Bcast:192.168.1.255 What are good starting settings to store for exposure bracketing shots? I started experimenting with the Custom Functions (C1,C2,C3) on my Canon 7D and I decided a useful one to have may be setting it up for exposure bracketing. So it's a quick switch if I ever need it, as opposed to going through the menu to set it up.  I realize the settings would vastly depend on the situation, but do you have any suggestions for some good all round settings to program in as a starting point?    Examples: 1 stop vs 1 1/3 vs 2 stop brackets / ISO choices / Metering mode / shooting mode and so on.