Search butonunu, arama alanının sağına almak?

        <!-- header_search -->
        <div id="header_search">
            <form action="<?php bloginfo('url'); ?>/" method="get">
                <fieldset>
                    <input type="image" src="<?php bloginfo('template_url'); echo $css_style_path; ?>/images/button_search.gif" alt="search" id="main_search_sub" />
                    <input type="text" value="Search..." name="s" id="main_search_val" onclick="this.value=''" onblur="if(this.value=='') this.value='Search...';" />
                </fieldset>
            </form>
        </div>
        <!-- /header_search -->

#header_search{
    float:right;
    padding:7px 0 0 20px;
}
#header_search fieldset{
    float:right;
}
#main_search_sub{
    float:left;
    width:65px;
    height:20px;
}
#main_search_val{
    float:right;
    border:1px solid #000;
    background:#fff;
    color:#000;
    font-family:Verdana, Geneva, sans-serif;
    font-size:1.2em;
    padding:2px;
    margin:0 10px 0 0;
    width:173px;
}