title: jquery concatenate string and input value to get id
body: <p>I'm trying to get an id field by concatenating a sting and an input value.
  The input value changes based on a previous action in the page and I want to be able to use that create an action.</p>
  
  <pre><code>            var ID=$("#PeoplePickerIDField").val();
              var blocker="$('#block"+ID+"')";
              if (blocker.val() == "Allow"){
                  alert("Allowed");
              } else {
                  alert("Not Allowed");
              }
  </code></pre>
  
  <p>The value of the field "PeoplePickerIDField" is the one that changes and this corresponds to the block field also (this id already changes based on what is in the "PeoplePickerIDField").</p>
  
  <p>any help would be appreciated :)</p>
  
  <p>thanks</p>