<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script>
function init(){
var d=document.getElementById("b");
var e=document.getElementById("c");
a.onclick=function(){
if(d.style.display=="none"){
d.style.display="block";
e.style.display="none";
}else{
d.style.display="none";
e.style.display="block";
}
}
}
</script>
</head>
<body onload="init()">
<input type="button" value="显示/隐藏" id="a">
<img src="img/login13.jpg" id="b" width="100%" style="display: none;">
<img src="img/飞机05.gif" id="c" width="100%" style="display:block ;">
</body>
</html>