如何得到iframe里的一个元素的值？

[zsuwwj]

例如：
<IFRAME src="editor.htm" name=iEditor width="100%" height="190">
</IFRAME>
在editor.htm里有一个sContent的变量，如何得到它的值？

[saucer]

use frames['iEditor'].sContent, for example

1.editor.htm:
<script language="javascript">
sContent= 999;//this makes sContent part of window
</script>
<input id="txt1" value="123">


2. frame.htm:
<IFRAME src="editor.htm" name=iEditor width="100%" height="190">
</IFRAME>
<input type="button" value="get iframe variable" onclick="alert(frames['iEditor'].sContent)">
<input type="button" value="get iframe value" onclick="alert(frames['iEditor'].document.all('txt1').value)">

[ssm1226]

index.htm

<IFRAME src="editor.asp" name=iEditor width="100%" height="190">
</IFRAME>
<INPUT type="button" value="显示text控件值" id=button1 name=button1 onclick="alert(iEditor.document.all.txt.value)">
<br>
<INPUT type="button" value="显示变量值" id=button2 name=button2 onclick="alert(iEditor.name)">
----------------------------------------------------------------------
editor.htm
<script language=javascript>
var name="ssm1226";
</script>
<input type=text name=txt value="ssm1226">

[zsuwwj]

谢谢！
请问如何给分啊？