<html>
<head>
<title>数组的操作</title>
<script type="text/javascript">
function B(){
var names=["zhangsan","lisi","wangwu"];
var name=document.getElementById("name").value;
var position = names.indexOf(name);
alert(position);
if (position >=0) {
alert("find"+name+"at position"+position);
}else {
alert("not find"+name);
}
}
</script>
</head>
<body>
<input type="text" name="name" id="name">
<input type="button" value="dian" onclick="B();">
</body>
</html>