JS隐藏全部SELECT标签

<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>新建网页 1</title>
</head><body>
<p><select size="1" name="D2"></select><select size="1" name="D3"></select><select size="1" name="D4">
</select><select size="1" name="D5"></select></p>
<input value="隐藏所有SELECT标签" type=button onclick="hideAllSelect()">
<script type=text/javascript> function hideAllSelect()
{
var selects = document.getElementsByTagName("SELECT");
for(var i = 0 ; i<selects.length;i++)
{
selects[i].style.display = "none";
}
}
</script>
</body></html>