window.opener 是window.open或超链接<a> 打开的子页面调用父页面对象
例子如下
a.html
复制代码代码如下:
<html>
<head>
<title>父页面</title>
<script type="text/javascript">
function openB()
{
window.open('b.html','b','width=400,height=200,status=no,toolbar=no,menubar=no,location=no,resizable=yes,left=200,top=100');
}
</script>
</head>
<body>
<form id="form1" action="">
<div>
输入值:
<input type="text" name="username" id="username" /><br />
<input type="button" value="打开窗口B" οnclick="openB();" /><br />
<a href="b.html" target="_blank">超链接打开B页面</a>
</div>
</form>
</body>
</html>
b.html
复制代码代码如下:
<html>
<head>
<script type="text/javascript">
function getpValue()
{
document.getElementByIdx_x_x_x("span1").innerText=window.opener.document.getElementByIdx_x_x_x("username").value;
}
</script>
</head>
<body>
<span>文本框值为:</span><span id="span1"></span><br />
<input type="button" value="获取父窗口内的文本框值" οnclick="getpValue();">
</body>
</html>