<!DOCTYPE html>
<html>
<head>
<title>126</title>
<meta charset="utf-8">
<script type="text/javascript">
window.onload=function()
{
var i;
var a=[];
var e=[];
var b=[];
for( i=0;i<5;i++)
{
b[i]=i;
}
var ov=document.getElementById("v");
ov.onclick=function ac()
{
a=document.getElementsByName("a");
if(a[0].checked)
{
alert(b);
b.shift();
alert("已经删除"+b);
}
else if(a[1].checked)
{
var c=document.getElementById("sr");
c=c.value;
b.unshift(c);
alert("增加"+b);
}
}
}
</script>
</head>
<body>
<form>
<span>请输入：<input type="text" id="sr" size="20"></span>
<span><input type="radio" name="a" value="s">删除</span>
<span><input type="radio" name="a" value="z">增加</span>
<input type="button" value="按钮" id="v">
</form>
</body>
</html>