javascript - jQuery: Set Element Attributes Using Object Values and Subvalues -

i update weekly schedule using following static table:

<table>   <tr class="live gm fsp">     <td>oct. 7</td>     <td>12:30 pm</td>     <td class="prog">show 1</td>     <td>team v team b</td>     <td class="tv-logo"></td>   </tr>   <tr class="gm dtv">     <td>oct. 7</td>     <td>4 pm</td>     <td class="prog">show 2</td>     <td>team c v team d</td>     <td class="tv-logo"></td>   </tr>   <tr class="usa gm pnc">     <td>oct. 7</td>     <td>6 pm</td>     <td class="prog">show 3</td>     <td>team e v team f</td>     <td class="tv-logo"></td>   </tr>   <tr class="gm pnc">     <td>oct. 7</td>     <td>8 pm</td>     <td class="prog">show 3</td>     <td>team e v team f</td>     <td class="tv-logo"></td>   </tr> </table> 

the class attribute of <tr> element determine inner html of <td class="tv-logo"></td> child element. inner html supposed linked <img/> of student tv channel logo. image src , alt (which use title) attributes contained in following object:

var networkclass = {   'fsp' : {     'src' : '/images/page-items/fsp.png',     'alt' : 'first student productions'   },   'dtv' : {     'src' : '/images/page-items/dtv.png',     'alt' : 'digital travel vlog'   },   'pnc' : {     'src' : 'http://4.bp.blogspot.com/-i9u1bdkwzzk/ur3wrv2vdsi/aaaaaaaaajw/fqbp37byf5y/s100/bmw_logo_black_white.png',     'alt' : 'production new cinema'   },   'usa pnc' : {     'src' : 'http://www.qservice.ro/assets/images/brands/slider_16.png',     'alt' : 'production new cinema'   } } 

the class usa sets corresponding <tr> have solid colored background requires white version of corresponding tv channel logo.

using answer found here (or http://jsfiddle.net/3wgmr/1/), can match class if has single value not 2 values. how set inner <img/> html of <td class="tv-logo"></td> while setting it's attributes using object? or advice appreciated!

if keys in networkclass valid css selectors use .is determine if element in question satisfies them, , in way reach result looking for.

the keys not selectors, if can assume whitespace-separated lists of css class names it's easy transform them selectors:

var key = "pnc usa"; var selector = key.replace(/(^|\s+)(\s+)/g, ".$2"); // ".pnc.usa" 

so can write this:

$('tr[class]').each(function() {     var $tr = $(this);     $.each(networkclass, function(key, attributes) {         var selector = key.replace(/(^|\s+)(\s+)/g, ".$2");         if ($tr.is(selector)) {             $tr.children(".tv-logo").append($("<img>", attributes));             break;         }     }); }); 

however, have pay attention details here: since .foo strictly less-specific selector .foo.bar , selector matches first determine result, must take care more specific selectors appear before less-specific ones on networkclass object:

var networkclass = {   //   'pnc usa' : {     'src' : '/images/page-items/pnc-white.png',     'alt' : 'production new cinema'   }   // must appear before   'pnc' : {     'src' : '/images/page-items/pnc.png',     'alt' : 'production new cinema'   }, }