请教高手javascript控制表单收放功能

Question

<form name=form1>
<input type=button onclick="var tdiv=getElementById('div1');if (tdiv.style.visibility=='hidden') tdiv.style.visibility='';else tdiv.style.visibility='hidden'">
<div id=div1>
   <input type=text><br>
   <input type=text><br>
   <input type=text><br>
   <input type=text><br>
   <input type=text><br>
</div>
</form>

Answer 1

<SCRIPT language=javascript>
function ifShow(){ if (divInformation.style.display=='none'){divInformation.style.display='block'}
else{divInformation.style.display='none'; }
}  <DIV id=divInformation style="DISPLAY: none">
<table>
<tr><td>sdlkjfalksdjfdlks</td></tr></table>
</div>

Answer 2

sorry 少了一个这个<a href="#xz" onClick="javascript:ifShow();">show
                                         </a>