Mine

{g->addToTrailer} 
<script type="text/javascript"> 
  // <![CDATA[ 
  var search_SearchBlock_searchDefault = '{g->text text="Search the Gallery"}'; 
  var search_SearchBlock_input = document.getElementById('search_SearchBlock').searchCriteria; 
  function search_SearchBlock_checkForm() {ldelim} 
    var sc = search_SearchBlock_input.value; 
    if (sc == searchDefault || sc == '') {ldelim} 
      alert('{g->text text="Please enter keywords to search."}'); 
      return false; 
    {rdelim} else {ldelim} 
      document.getElementById('search_SearchBlock').submit(); 
    {rdelim} 
  {rdelim} 
 
  function search_SearchBlock_focus() {ldelim} 
    if (search_SearchBlock_input.value == search_SearchBlock_searchDefault) {ldelim} 
      search_SearchBlock_input.value = ''; 
    {rdelim} 
  {rdelim} 
 
  function search_SearchBlock_blur() {ldelim} 
    if (search_SearchBlock_input.value == '') {ldelim} 
      search_SearchBlock_input.value = search_SearchBlock_searchDefault; 
    {rdelim} 
  {rdelim} 
  // ]]> 
</script> 
{/g->addToTrailer} 
 
<form id="search_SearchBlock" action="{g->url}" method="post" onsubmit="return checkForm()"> 
  <div> 
    {g->hiddenFormVars} 
    <input type="hidden" name="{g->formVar var="view"}" value="search.SearchScan"/> 
    <input type="hidden" name="{g->formVar var="form[formName]"}" value="search_SearchBlock"/> 
  </div> 
  <input type="text" id="searchCriteria" size="18" 
         name="{g->formVar var="form[searchCriteria]"}" 
         value="{g->text text="Search the Gallery"}" 
         onfocus="search_SearchBlock_focus()" 
         onblur="search_SearchBlock_blur()" 
         class="textbox"/> 
  <input type="hidden" name="{g->formVar var="form[useDefaultSettings]"}" value="1" /> 
  {if !empty($showAdvancedLink)} 
  <p class="advanced"> 
    <a href="{g->url arg1="view=search.SearchScan" arg2="form[useDefaultSettings]=1" 
                     arg3="return=1"}" 
       class="{g->linkId view="search.SearchScan"} advanced">{g->text text="Advanced Search"}</a> 
  </p> 
  {/if} 
</form>