I had the problem when I want to replace attribute img.  In class="HotProject_item HotProject_item_preview isotope-item" content class ="content-asset" have  &lt;img src="/Uploads/images/0110/112/image012.jpg" .    I want to change img src with new image. Can you help me?   &lt;div class="HotProject_item HotProject_item_preview isotope-item" zorder="1" row-num="1" data-id="149"  enddate="31/12/2014" mark="10" style="position: absolute; left: 0px; top: 0px; -webkit-transform: translate3d(0px, 0px, 0px);"&gt;  &lt;div class="content content_1 work" data-id="149" orgclass="content_1" curclass="content_1"&gt;  &lt;div class="content-tl"&gt;  &lt;div class="content-tr"&gt; &lt;/div&gt;  &lt;/div&gt; &lt;div class="content-bl"&gt; &lt;div class="content-br"&gt; &lt;div class="content-main"&gt;  &lt;div class="content-mask-tl"&gt;&lt;/div&gt; &lt;div class="content-mask-tr"&gt;&lt;/div&gt; &lt;div class="content-mask-bl"&gt;&lt;/div&gt; &lt;div class="content-mask-br"&gt; &lt;/div&gt; &lt;div class="content-inner"&gt;  &lt;div class="content-top"&gt;  &lt;div class="content-asset"&gt; &lt;a href="javascript:void(0);" data-id="149"&gt; &lt;img src="/Uploads/images/B%C3%ACnh%20ch%E1%BB%8Dn%20sp/thang%207/tu-lanh-1.jpg" alt=""&gt; &lt;/a&gt;  &lt;/div&gt;  &lt;/div&gt;  &lt;div class="content-info"&gt; &lt;p class="title"&gt; &lt;a href="javascript:void(0);" data-id="149"&gt;Title ABC&lt;/a&gt; &lt;a href="javascript:void(0);" class="expand"&gt; &lt;img src="../HotProject/Css/img/more.png"&gt; &lt;/a&gt; &lt;/p&gt;  &lt;div class="divider"&gt;&lt;span&gt;&lt;/span&gt;&lt;/div&gt;  &lt;div class="subtitle summary" style="visibility: visible;"&gt;    Decription :)    &amp;nbsp;  &lt;/div&gt;   &lt;div class="subtitle description" style="visibility: visible;"&gt;    Subtitle    &amp;nbsp;&lt;/div&gt; &lt;/div&gt; &lt;/div&gt; &lt;/div&gt; &lt;/div&gt; &lt;/div&gt;   &lt;/div&gt;   &lt;div class="content_detail"&gt;  &lt;/div&gt;  &lt;/div&gt;
My DOM looks like this:  &lt;div id="d1"&gt;    &lt;div class="c1"&gt;             &lt;a href="#"&gt;&lt;img src="img1_on.gif"&gt;&lt;/a&gt;             &lt;a href="#"&gt;&lt;img src="img2_on.gif"&gt;&lt;/a&gt;    &lt;/div&gt; &lt;/div&gt;   When someone clicks on an image, I want the image src to change to &lt;img src="imgx_off.gif"&gt; where x represents the image number 1 or 2.  Is this possible or do I have to use CSS to change the images?
I'm trying to make a longtable that is wider than the textwidth at a certain moment. I've tried different things always ending up with a different problem:  First possibility: If I use the adjustwidth environment the longtabu does not align correctly. The left margin stays fixed and the right margin gets out of the page. This in contrast, if I do the exact same thing to make a tabu (instead of longtabu), it works perfectly. I think using the adjustwidth is the best way to go, but I can't manage to get it working.  Second possibility: I've found a solution using the fullwidth package. That package does the trick on small longtables, but freezes when I'm trying to do it on my big longtable. The command \setlength\LTleft{-2cm} didn't work as well.  The final option I tried was to use geometry. But that changes the margin of the whole page thus making a page break which I'm not interested in. The code I used for this was  \newgeometry{left=1.2cm} \begin{longtable} long table stuff \end{longtable} \restoregeometry   Here's an example of what I want contra what I get  \documentclass[a4paper]{article} \usepackage{longtable} \usepackage{chngpage} \usepackage{lipsum} \usepackage{tabu}  \begin{document} \section{This is the original textwidth.} \lipsum[1]  \section{This is the width I need for my longtabu} \begin{adjustwidth}{-1in}{-1in} \begin{tabu} to \linewidth {*{13}{|X[l]} |} 01 &amp; 02 &amp; 03 &amp; 04 &amp; 05 &amp; 06 &amp; 07 &amp; 08 &amp; 09 &amp; 10 &amp; 11 &amp; 12 &amp; 13 \\ 01 &amp; 02 &amp; 03 &amp; 04 &amp; 05 &amp; 06 &amp; 07 &amp; 08 &amp; 09 &amp; 10 &amp; 11 &amp; 12 &amp; 13 \\ 01 &amp; 02 &amp; 03 &amp; 04 &amp; 05 &amp; 06 &amp; 07 &amp; 08 &amp; 09 &amp; 10 &amp; 11 &amp; 12 &amp; 13 \\ 01 &amp; 02 &amp; 03 &amp; 04 &amp; 05 &amp; 06 &amp; 07 &amp; 08 &amp; 09 &amp; 10 &amp; 11 &amp; 12 &amp; 13 \\ \end{tabu} \end{adjustwidth}  \section{This is what happens} \begin{adjustwidth}{-1in}{-1in} \begin{longtabu} to \linewidth {*{13}{|X[l]} |} 01 &amp; 02 &amp; 03 &amp; 04 &amp; 05 &amp; 06 &amp; 07 &amp; 08 &amp; 09 &amp; 10 &amp; 11 &amp; 12 &amp; 13 \\ 01 &amp; 02 &amp; 03 &amp; 04 &amp; 05 &amp; 06 &amp; 07 &amp; 08 &amp; 09 &amp; 10 &amp; 11 &amp; 12 &amp; 13 \\ 01 &amp; 02 &amp; 03 &amp; 04 &amp; 05 &amp; 06 &amp; 07 &amp; 08 &amp; 09 &amp; 10 &amp; 11 &amp; 12 &amp; 13 \\ 01 &amp; 02 &amp; 03 &amp; 04 &amp; 05 &amp; 06 &amp; 07 &amp; 08 &amp; 09 &amp; 10 &amp; 11 &amp; 12 &amp; 13 \\ \end{longtabu} \end{adjustwidth}  \end{document} Is it possible to reference the most recently modified file in a command line argument? I frequently download PDF files with heinous numeric file names from my browser.  These automatically go into ~/Downloads.  Ideally I would like to just be able to open these files with:  evince "the most recently modified file"   without having to open ~/Downloads to find the file name.  Is there a simple way to specify "the most recently modified file" in bash?  NOTE: I know that it is possible to do this, but ideally I am looking for a solution that would be simpler than ls -t'ing ~/Downloads to check the name. Initializing a member array in constructor initializer Can polymorph and true polymorph change a PC's race and sex? Can't open a folder in windows 7 64bit, by double clicking, it shows me that the default option for opening folder is "cmd" (it's highlighted when i'm right clicking a folder, and the "open" option comes next). I've tried running some registry fixing tools, but it didn't fix it. Can someone suggest me what should I do. What is wrong with this proof?    Is $\pi=4?$ Is there a general formula for solving 4th degree equations (quartic)? There is a general formula for solving quadratic equations, namely the Quadratic Formula:  $$ x = \frac{ -b \pm \sqrt{ b^2 - 4ac } }{ 2a } $$  For third degree equations of the form $ax^3+bx^2+cx+d=0$, there is a set of three equations: one for each root. Is there a general formula for solving equations of the following form? $$ ax^4 + bx^3 + cx^2 + dx + e = 0 $$ How about for higher degrees? If not, why not? Let $f$ be a continuous function on $[0,1]$ such that $f([0,1])=[0,1]\times[0,1].$ Then show that $f$ is not one-one.  Hints will be appreciated. How to create multiplied identity t-sql? $$\lim _{x\rightarrow 5}\frac{x^2-25}{x-5}  = \lim_{x\rightarrow 5} (x+5)$$  I understand that to evaluate a limit that has a zero ("hole") in the denominator we have to factor and cancel terms, and that the original limit is equal to the new and simplified limit. I understand how to do this procedurally, but I'd like to know why this works. I've only been told the methodology of expanding the $x^2-25$ into $(x-5)(x+5)$, but I don't just want to understand the methodology which my teacher tells me to "just memorize", I really want to know what's going on. I've read about factoring in abstract algebra, and about irreducible polynomials (just an example...), and I'd like to get a bigger picture of the abstract algebra in order to see why we factor the limit and why the simplified is equal to the original if it's missing the $(x-5)$, which has been cancelled. I don't want to just memorize things, I would really like to understand, but I've been told that this is "just how we do it" and that I should "practice to just memorize the procedure." I really want to understand this in abstract algebra terms, please elaborate. Thank you very much. Application of Kolmogorov's Zero-One Law Most of the books I read, they only state some examples of tail events. One of them is  $[\sum_n X_n \ converges]$. My main problem is to show that this is indeed a tail event. Detect which TeX engine is used How can I detect inside a TeX file which engine (pdftex/xetex/luatex) is used to compile the file? Is there a LaTeX package that provides this functionality? I followed the official step-by-step "Visual Studio Code and Unity" guide, but it seems I messed up something, because Intellisense doesn't see any Unity related stuff.  Like the MonoBehaviour class and its members (like .transform), or the Unity callbacks, like Start or Update. What is the reasoning behind the design decision to allow users to create a display name which matches another existing users exactly?    This is opposed to the common practice of enforcing unique user names, and I'd really like to learn something. Using strtok with a std::string I have a string that I would like to tokenize. But the C strtok() function requires my string to be a char*. How can I do this simply?  I tried:  token = strtok(str.c_str(), " ");    which fails because it turns it into a const char*, not a char* Is there any way to get real-time compilation for LaTeX? I would really love to have a software or tool which provided real time compilation of my LaTeX document (to be able to see the final pdf or dvi document as I type the latex code), especially for when I am drawing pictures using tikZ. So far, I know of two things, but none of them work for me. They are:   : This is only for tikZ, which would be perfect for me, but unfortunately as far as I know it only works with Ubuntu and Debian, and I use Mac OS X (so I have never actually tried it, though I did dig a lot to see whether I would be able to install on my mac and from what I see it is really what I want - I am even considering installing Ubuntu just to use it!). : This is a minor mode for Emacs. It was extremely hard to get it to work on the mac (see my quest ), and it is not all that fast. The speed is not all that big of a deal for me, but the fact that it does not work with tikZ pictures is (the nodes all collapse in one point so that the words are all one on the top of the other).   So my question is: is there a software ideally like KtikZ or another type of editor which provides real-time compilation and that I can use on my mac? I guess if you know of a Windows/Linux option I would also like to know, and the same for a way to set up a script to get the document compiled every 5 seconds or so (I am sure I have seen this written somewhere, but I don't know whether I can do it with a mac or whether it is editor/pdf viewer dependent), but what I really want is a software/tool which would work with a mac.  To be clear, I am not after something like LyX, that is, I am not after a WYSIWYG-type thing, but rather something where I can type real LaTeX and see my code, but have at the same time another window showing me the pdf (or dvi) file compiled. Let $n \geq 1$ be an odd integer. Show that $D_{2n}\cong \mathbb{Z}_2 \times D_n$. Let $n \geq 1$ be an odd integer. Show that $D_{2n}\cong \mathbb{Z}_2 \times D_n$. I define a map $$\phi:D_{2n} \rightarrow \mathbb{Z}_2 \times D_n$$ by $R \mapsto (0,r^{\frac{n+1}{2}})$ and $M \mapsto(1,m)$. Then I am stuck at showing the map is bijective. By the way, do we need to show that $(0,r^{\frac{n+1}{2}})(1,m)(0,r^{\frac{n+1}{2}})^{-1}=(1,m)$ ? If we can prove this, then what can we conclude? Why is removing instationarities a good thing when trying to forecast a time series? Use of comma separating two adjectives If I had the phrase       two blond haired, blue eyed people    would the comma be out of place?    should I hyphenate "blond haired" and "blue eyed"? what is the relationship between the dynamical casimir effect and virtual particles?