JavaScript form submit using image: example

<form name="myform" action="handle-data.php">
Search: <input type='text' name='query' />
<a href="javascript: submitform()">
<img src="go.gif" width="33" height="19" border="0" />
</a>
</form>
<script type="text/javascript">
function submitform()
{
    if(document.myform.onsubmit &&
    !document.myform.onsubmit())
    {
        return;
    }
 document.myform.submit();
}
</script>