<!DOCTYPE html>
<html>
<head>
<title>MyHtml.html</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<script type="text/javascript">
window.onload = function() {
var flag=false;
document.getElementById("all").onclick=function(){
flag=!flag;
var items=document.getElementsByName("item");
for(var x=0;x<items.length;x++){
items[x].checked=flag;
}
};
document.getElementById("unall").onclick=function(){
var items=document.getElementsByName("item");
for(var x=0;x<items.length;x++){
items[x].checked=!items[x].checked;
}
};
}
</script>
</head>
<body>
<div>商品列表</div>
<input type="checkbox" name="item" value="3000" />笔记本3000元<br />
<input type="checkbox" name="item" value="2500" />HTC手机2500<br />
<input type="checkbox" name="item" value="8000" />苹果电脑8000<br />
<input type="checkbox" name="item" value="1500" />IPAD1500<br />
<input type="checkbox" name="item" value="400" />玩具汽车400<br />
<input type="button" value="总金额" onclick="getSum()" />
<input type="button" value="全选/全不选" id="all" />
<input type="button" value="反选" id="unall" />
<span id="sumId"></span>
</body>
</html>
