BOM（Broswer Object Model）
方法：
框窗
1.警告框
window.alert("msg");
2.确认框
window.confirm("msg");
3.询问框
window.prompt("msg","defaulvalue")
var result = window.prompt("请输入密码","例如:132456")
页面
1.打开一个窗口
window.open()
2.在子窗口中使用，表示父窗口的window对象
window.opener
3.关闭当前窗口
window.close()
定时任务
1.定时任务
var taskid = window.setTimeout(function,ms);
2.间隔执行任务
var taskid = window.setInteval(function,ms);
3.清除定时任务
window.clearTimeout(taskid);
4.清除间隔执行任务
window.clearInteval(taskid);
<script type="application/javascript">
function confirmBuy(){
var flag = window.confirm("您确定要付款吗？")
if(flag){
//付款成功
window.open("success.html",'success',"height=300,width=500,top=50,left=50,toolbar=no,menubar=no,scrollbars=no,resizable=no,location=no,status=no")
}
}
</script>
<body>
<h1>购物车</h1>
<hr/>
<ul>
<li>商品1</li>
<li>商品2</li>
<li>商品3</li>
</ul>
<button onclick="confirmBuy();">确认付款</button>
</body>
<script type="application/javascript">
/* window.onload = function(){
window.setTimeout(closeSelf,1000);
}
function closeSelf(){
var secval = document.getElementById("sec").innerHTML
var secint = parseInt(secval);
document.getElementById("sec").innerHTML = --secint;
if(secint == 0){
window.close();
}
window.setTimeout(closeSelf,1000)
}*/
var taskid = 0;
window.onload = function(){
taskid = window.setInterval(closeSelf,1000)
}
function closeSelf(){
var secval = document.getElementById("sec").innerHTML;
var secint = parseInt(secval)
document.getElementById("sec").innerHTML = --secint;
if(secint == 0){
window.close();
}
}
function stopTask(){
window.clearInterval(taskid);
}
function goonTask(){
taskid = window.setInterval(closeSelf,1000);
console.log(taskid)
}
</script>
<body>
付款成功，页面将在<span id="sec">10</span>s后关闭。
<button onclick="stopTask()">稍等，待会我会自己关闭</button>
<button onclick="goonTask()">继续读秒，关闭窗口</button>
</body>