<div id="myDiv" style="width:100px;border:1px solid #aaa;">
<p>

</p>
</div>
<input type="button" onclick="isVisibility(document.getElementById('myDiv'))" value="是否可见visibility" />
<input type="button" onclick="isDisplay(document.getElementById('myDiv'))" value="是否可见display" />
<script>
function isVisibility(me){
if (me.style.visibility=="hidden"){
me.style.visibility="visible"; }
else{
me.style.visibility="hidden";
}
}

function isDisplay(me){
if (me.style.display=="none"){
me.style.display="block"; }
else{
me.style.display="none";
}
}
</script>