Basic Show/Hide w/ radio buttons

HTML

<div id="body_part_primary" name="body_part_primary">1rst</div>
<div id="body_part_secondary" name="body_part_secondary" style="display:none">I'm hidden</div>
<br/>

<div id="body_part_info">
     <input type="text" class="hide" name="body_shape_importance" />
<input type="radio" name="body_shape_importance" checked="checked" value="PrimaryShape" />Primary Shape</label>
<input type="radio" name="body_shape_importance" value="ToneCellulite" />Tone/Cellulite
<input type="radio" name="body_shape_importance" value="SecondaryShape" /> Secondary Shape
</div>

JavaScript

$(document).ready(function(){
//var current_Importance = $("input:radio[name=body_part_description]:checked"); 
//$("#body_part_primary, #body_part_secondary").hide();
    
     $('[name="body_shape_importance"]').change(function () {     
    if( $("input:radio[name=body_shape_importance]:checked").val() === "SecondaryShape"){                  
             $("[name=body_part_primary]").hide();  
              $("[name=body_part_secondary]").show();   
         }
         else {
             $("[name=body_part_secondary]").hide();
             $("[name=body_part_primary]").show();   
         }
  });
});