以下语句判断框架(ifm_Test)是否被加载,完成后显示提示信息,为什么无效?
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<html>
<head>
<script language="javascript">
function loadFile(){
document.frames("ifm_Test").href="http://www.youkuaiyun.com";
document.frames("ifm_Test").document.onreadystatechange=fnStartInit;
}
function fnStartInit()
{
if (document.frames("ifm_Test").document.readyState=="complete")
{
alert("框架文件加载完毕!");
}
}
</script>
</head>
<body>
<iframe name="ifm_Test"></iframe>
<br>
<input type="button" value="click me" οnclick="javascript:loadFile()">
</body>
</html>
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<html>
<head>
<script language="javascript">
function loadFile(){
document.frames("ifm_Test").href="http://www.youkuaiyun.com";
document.frames("ifm_Test").document.onreadystatechange=fnStartInit;
}
function fnStartInit()
{
if (document.frames("ifm_Test").document.readyState=="complete")
{
alert("框架文件加载完毕!");
}
}
</script>
</head>
<body>
<iframe name="ifm_Test"></iframe>
<br>
<input type="button" value="click me" οnclick="javascript:loadFile()">
</body>
</html>