can't call "this" properly in jQuery -


i have following jquery seems working fine except for: 

$(this).attr('src', 'img/upgreen.png');

is there reason why wouldn't work ?

$(function addthumbs() { $('.vote-up').bind('click', function() {     // 'this' dom element     // wrap 'this' in jquery object     var img = $(this);     // have full jquery api @ our disposal     var review_id = $('#review_id').val();     var user_id = $('#user_id').val();       if (user_id == 1)          { alert('...'); }     else      {             $("#flash").show();             $("#flash").fadein(400).html('<img src="ajax-loader.gif" />loading comment...');             $.ajax({                         type: "post",                         url: "ajax-thumbsup.php",                                 data:{                                   "user_id" : user_id,                                  "review_id" : review_id       //we passing name value in url                                 },                         cache: false,                         success: function(html)                             {                             $("#progressdiv").show();                             $("#progressdiv").fadein(400).html('success');                             $(this).attr('src', 'img/upgreen.png');                             }                     });     }return false; });

});

html inside loop

                                    <div class="thumbs">                                         <input type="hidden" id="review_id" value="<?php echo $review['review_id']?>" />                                         <input type="hidden" id="user_id" value="<?php echo $user_id ?>" />                                         <div id="pluses">0</div> <div id="progressdiv"></div>                                         <a><img class="vote-up" src="img/up.png" alt="thumbs up" /> </a>                                          <a><img class="vote-down" src="img/down.png" alt="thumbs down" /> </a>                                         <div id="minuses">0</div>                                     </div>                                      <div class="thumbs">                                         <input type="hidden" id="review_id" value="<?php echo $review['review_id']?>" />                                         <input type="hidden" id="user_id" value="<?php echo $user_id ?>" />                                         <div id="pluses">0</div> <div id="progressdiv"></div>                                         <a><img class="vote-up" src="img/up.png" alt="thumbs up" /> </a>                                          <a><img class="vote-down" src="img/down.png" alt="thumbs down" /> </a>                                         <div id="minuses">0</div>                                     </div>

this inside ajax callback isn't same this inside click handler.

fortunately - saved reference it! use:

img.attr('src', 'img/upgreen.png');

nb: if had saved img = this instead of img = $(this) have written:

img.src = 'img/upgreen.png';

without call jquery.


Comments

Post a Comment

Popular posts from this blog

python - How to create a legend for 3D bar in matplotlib? -

Image
given ax = plt.subplot() : ax.bar()[0] can passed plt.legend() . however, ax.bar3d() returns none . how create legend displayed bars? update: passing legend="stuff" ax.bar3d() , calling ax.legend() raises /usr/lib/python2.6/site-packages/matplotlib/axes.py:4368: userwarning: no labeled objects found. use label='...' kwarg on individual plots. warnings.warn("no labeled objects found. " you need use proxy artist legends not supported. this code: from mpl_toolkits.mplot3d import axes3d import matplotlib.pyplot plt import numpy np fig = plt.figure() ax = fig.add_subplot(111, projection='3d') x, y = np.random.rand(2, 100) * 4 hist, xedges, yedges = np.histogram2d(x, y, bins=4) elements = (len(xedges) - 1) * (len(yedges) - 1) xpos, ypos = np.meshgrid(xedges[:-1]+0.25, yedges[:-1]+0.25) xpos = xpos.flatten() ypos = ypos.flatten() zpos = np.zeros(elements) dx = 0.5 * np.ones_like(zpos) dy = dx.copy() dz = hist.flatten() ax...
Read more

java - Multi-Label Document Classification -

i have database in store data based upon following 3 fields: id, text, {labels}. note each text has been assigned more 1 label \ tag \ class. want build model (weka \ rapidminer \ mahout) able recommend \ classify bunch of labels \ tags \ classes given text. i have heard svm , naive bayes classifier, not sure whether support multi-label classification or not. guides me right direction more welcome! the basic multilabel classification method one-vs.-the-rest (ovr), called binary relevance (br). basic idea take off-the-shelf binary classifier, such naive bayes or svm, create k instances of solve k independent classification problems. in python-like pseudocode: for each class k: learner = svm(settings) # example labels = [class_of(x) == k x in samples] learner.learn(samples, labels) then @ prediction time, run each of binary classifiers on sample , collect labels predict positive. (both training , prediction can done in parallel, since problems assumed ...
Read more

php - Dynamic url re-writing using htaccess -

how can rewrite http://mydomain.com/test/master.php?catid=2&subcatid=8 http://mydomain.com/test/master.php/catname/subcat using .htaccess file. once rewritten, how can access these parameters in master.php? note: untested, let me know if doesn't work. rewriterule ^master.php/([a-za-z0-9_-]+)/([a-za-z0-9_-]+)$ /master.php?catid$1&subcatid=$2 [l]
Read more