WordCloud.hitTest Method
        
 Determines what data control element is represented at the specified position.
 
         
        Parameters
        
            - offsetX
            
 
            - 
                
Type: Number
The position to test in pixels relative to the left edge of the chart. 
            - offsetY
            
 
            - 
                
Type: Number
The position to test in pixels relative to the top edge of the chart. 
            - element
            
 
            - 
                
Type: HTMLElement
The HTML element located at the position, if available.
Optional: True 
        
        Return Value
        
Type: Object - May be null
If not null, a plain object with properties:
     type                                    [type: String]                          - type of cell
     rowOrdinals                             [type: Array]                           - the row tuple ordinals
     columnOrdinals                          [type: Array]                           - the column tuple ordinals
     member                                  [Type: dundas.data.HierarchyMember]     - selected hierarchy member    
     node                                    [Type: Object]                          - selected word