<script>
  function OutputBackImg(input_name){
   input_name.style.backgroundColor = "#FFFFF7";
    input_name.style.backgroundImage = "";
  }
  </script>

  <?
  
   if(!$_POST['main_search']) {
    $main_search_img1 = "style=\"BACKGROUND-IMAGE: url(http://www.ifull.co.kr.co.kr/images/serch_img.gif)undefined; BACKGROUND-REPEAT: no-repeat\"  onfocus=\"javaScript:OutputBackImg(this);\"";
    $main_search_txt= "";
   } else {
    $main_search_img1 = "onFocus=this.value=''";
    $main_search_txt= $_POST['main_search'];
   }
   
  ?>

     <form name="sform" action="/list.php" method="post">
            <tr>
              <td width="33" height="5"></td>
              <td width="302"></td>
              <td width="31" rowspan="3"><input type="image" src="http://www.ifull.co.kr/images/serch.gif" alt="검색" width="31" height="36" border="0" /></td>
              <td width="10" rowspan="3"></td>
            </tr>
   <tr>
              <td height="26"></td>
              <td><input type="text" name="main_search" id="top_search" autocomplete="off" style="width:295px; border-line:#ffffff; border:0px; font-weight:bold;" <?=$main_search_img1?>  title="검색어입력" value="<?=$main_search_txt?>" /></td>
            </tr>
            <tr>
              <td height="5"></td>
              <td></td>
            </tr>
     </form>