jQuery enlarge image on mouseover

i'm trying to enlarge an image on mouse over and shrink on mouse out.

       <script type="text/javascript">

function grow(){

function shrink(){


      <h3>Buy  - <?echo($Event." ".$Date)?> -       <img src="http://XXXXX/members/resources/images/image-1.jpg" id="preview" width="100px" height="65px" onmouseover="grow()" onmouseout="shrink()"> </h3>
        Any ideas why this isn't working as expected?
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Michael CarrilloInformation Systems ManagerCommented:
You should use # for id and . for class.
You have preview as an id.  Thus you should use 'img#preview' in your functions.

I am not sure but I think you are missing a semicolon at the end of your functions definitions grow() and shrink(); after the closing }

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<script type="text/javascript">

function grow(){

function shrink(){

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