<body>
<img src="tt/hetao.jpg" style="visibility:visible" />
<img src="tt/hetao.jpg" style="visibility:visible" />
<img src="tt/hetao.jpg" style="visibility:visible" />
<input type="button" id="xs" value="xs" onclick="return button_onclick('visible')" />
<input type="button" id="yc" value="yc" onclick="return button_onclick('hidden')" />
<script type="text/javascript">
function button_onclick(obj){
var imgs = document.images;
for(n in imgs){
if(imgs[n]==imgs.length){ //忽略第一个元素它不是图片对象
continue;
}
imgs[n].style.visibility=obj;
}
}
</script>
</body>
注释的那一句啥意思,,求大神解答还有第一个元素是啥