title: knockout compose image src
body: <p>I have following code, and have trouble composing the src for the image.</p>
  
  <p>The issue is with accessing the longitude and latitude parameters in the src, cause above I can access them to print them out.</p>
  
  <pre><code>&lt;div data-bind='foreach: posts'&gt;
              &lt;div class="well"&gt;
                  &lt;div class="row"&gt;
                      &lt;div class="col-xs-12 col-md-12"&gt;&lt;h4&gt;&lt;span data-bind='text: Name'&gt;&lt;/span&gt;&lt;/h4&gt;&lt;/div&gt;
                  &lt;/div&gt;
                  &lt;div class="row"&gt;
                      &lt;div class="col-xs-12 col-md-8"&gt;
                          &lt;div class="row"&gt;
                              &lt;div class="col-xs-12 col-md-2"&gt;&lt;b&gt;Address:&lt;/b&gt;&lt;/div&gt;
                              &lt;div class="col-xs-12 col-md-10"&gt;&lt;span data-bind='text: Address'&gt;&lt;/span&gt;&lt;/div&gt;
                          &lt;/div&gt;
                      &lt;/div&gt;
                      &lt;div class="col-xs-12 col-md-4"&gt;
                          Longitude: &lt;span data-bind='text: Longitude'&gt;&lt;/span&gt; -  Latitude: &lt;span data-bind='text: Latitude'&gt;&lt;/span&gt;
                          &lt;img data-bind="attr: {'src':  'http://maps.googleapis.com/maps/api/staticmap?center='+ Latitude+','+ Longitude+'&amp;zoom=13&amp;size=300x300&amp;maptype=roadmap&amp;markers=color:red%7C'+ Latitude+','+ Longitude}" /&gt;
                      &lt;/div&gt;
                  &lt;/div&gt;
              &lt;/div&gt;
          &lt;/div&gt;
  </code></pre>