检索TextBox的状态

<tr>
<td width="25%">书名</td>
<td width="60%">

<input class="searchFormLable" type=text value="请输入书名" name="title" size="60" onmouseover="this.focus()" onblur="if (value ==''){value='请输入书名'}" onfocus="this.select()" onclick="if(this.value=='请输入书名')this.value=''" />

</td>
<td width="15%">
 <label></label>
</td>
</tr>