title: dynamic HLOOKUP in google doc spreadsheet
body: <p>I would like to create a HLOOKUP in google doc spreadsheet:</p>
  
  <pre><code>=HLOOKUP(aValue;DEC10!$D$2:$W$3;2;FALSE)
  </code></pre>
  
  <p>I have another cell A16 that contains 'DEC10' (a characters cell)
  'DEC10' is here the sheet name of the table in which I want to search.
  How can I dynamically create the HLOOKUP using my cell A16?
  For instance without editing the HLOOKUP formula I want to be able to change sheet DEC10 into sheet DEC11.</p>