document.write('<form action="/space/batch.search.php" method="post"  class="csssearch"><input type="text"  style="line-height:14px;border:1px #369 solid;color:#666" size="24" name="searchkey" value="" /> <input style="font-size:12px;background-color:#dcf5d5;padding:1px;border:1px #0c9 solid;color:#369" type="submit" name="authorsearchbtn" value="search" /> <input id="content" name="searchname" type="hidden" value="message" /><input type="hidden" name="formhash" value="27b1a788" /></form>');

function changetype() {
	if($('searchtxt').value == '标题') {
		$('searchname').value = 'subject';
	}else if($('searchtxt').value == '内容') {
		$('searchname').value = 'message';
	}else if($('searchtxt').value == '作者') {
		$('searchname').value = 'author';
	}
}