发布时间：2019-08-10 01:11:27
<html>
<head>
<style>
#dj{color:red;font-size:30px; border:thin;}
</style>
<script language="javascript">
var sw=document.getElementById("sw");
var ws=document.getElementById("ws");
var dj=document.getElementById("dj");
sw.Onclick=function(){
dj.innerHTML="sw.value";
dj.style.display="inline";
}
sw.Onclick=function(){
dj.innerHTML="ws.value";
dj.style.display="inline";
}
</script>
</head>
<body><form>单价:
<span id="dj" value="dj"></span>
<button id="sw" value="35">35</button>
<button id="ws" value="50">50</button>
</form>
</body>
</html>
js放到<body后面