Hello I need to print a page in a parent iframe but I dont get it. My code JavaScript is:

<script Language="javascript">

function printfile()
{
window.frames['pictures'].focus();
window.frames['pictures'].print();
}

</script>
My index.html page contains 3 iframes:

<body>
<div id="wrapper">
<div id="header">
<iframe id="header" src="header.html" ></iframe>
</div>
<div id="content">
<iframe id="content" src="arm001.html" Scrolling="no"> </iframe>

</div>
<div id="footer"><iframe id="footer" src="footer.html" > </iframe></div>
</div>
</body>
I'll apreciate your contribution