iFrame_b:
<form name=frm>
<INPUT TYPE="text" NAME="txt" value="a">
<INPUT TYPE="text" NAME="txt" value="b">
<INPUT TYPE="text" NAME="txt" value="c">
</form>a:
document.frames["iFrame_b"].document.frm.txt[0].value //取第一个文本框的值a
document.frames["iFrame_b"].document.frm.txt[1].value //取第二个文本框的值b
...
<form name=frm>
<INPUT TYPE="text" NAME="txt" value="a">
<INPUT TYPE="text" NAME="txt" value="b">
<INPUT TYPE="text" NAME="txt" value="c">
</form>a:
document.frames["iFrame_b"].document.frm.txt[0].value //取第一个文本框的值a
document.frames["iFrame_b"].document.frm.txt[1].value //取第二个文本框的值b
...
<form onsubmit='getText()' name='form1'>
<input type=text name=a>
<input type=hidden name='t'>
<input type=submit value='submit' name='s'>
</form>
<script>
function getText()
{
t.value = window.frames.iFrame_b.document.frm.txt1.value;
form1.submit();
}
</script>
iFrame_b:
<form name=frm>
<INPUT TYPE="text" NAME="txt1" value="a">
</form>