<script>
  element.onkeypress = function(event) {  
  event = event || window.event   
    if (event.preventDefault) {   
        event.preventDefault()  
    } else {  
         event.returnValue = false 
    }  
} 
</script>

<form id="searchForm" name="searchForm"  method="post"   onkeypress = "if(event.keyCode == 13) javascript:searchNameq()>
<textarea name="searchq" type="text" id="searchq"></textarea>

<input type="button" name="submitSearch" id="submitSearch" value="Search" onclick="javascript:searchNameq()"  onkeypress="enter"  onMouseDown="javascript:searchNameq()">
</form>