<script type="text/javascript">

function openP(_id)

{

var select_id = parseInt(_id.replace("box",""));

for (i=1;i<=4;i++)

{

if (i==select_id)

{

document.getElementById("box"+i).style.display = "block";

}

else

{

document.getElementById("box"+i).style.display = "none";

}

}

}

</script>

<a href="javascript:void(0)" onclick="openP(′box1′)">点击展开1</a>

<p id="box1" style="display:none">这里面放的是box1的内容.</p>

<p><a href="javascript:void(0)" onclick="openP(′box2′)">点击展开2</a></p>

<p id="box2" style="display:none">这里面放的是box2的内容.</p>

<a href="javascript:void(0)" onclick="openP(′box3′)">点击展开3</a>

<p id="box3" style="display:none">这里面放的是box3的内容.</p>

<p><a href="javascript:void(0)" onclick="openP(′box4′)">点击展开4</a></p>

<p id="box4" style="display:none">这里面放的是box4的内容.</p>