<form id="searchForm" method="get" >
		<fieldset>
        
           	<input id="s" type="text" value="<?=(isset($_GET["s"]))?$_GET["s"]:"";?>">
            
            <input type="submit" value="Submit" id="submitButton">
            
            
            
            
        </fieldset>
    </form>

<script>
<?php

if(isset($_GET["s"]) and trim($_GET["s"])!=""){

echo 'document.getElementById("searchForm").submit();';

}

?>
</script>