Getting Two Errors With Hidden Frame?
Mar 1, 2010
I'm creating a simple page that consists of a hidden frame and a main page. The main page gets the javascript functions from the hidden frame. One function displays a scrolling message and the other displays an alert. I'm getting two errors, but they are the same one. "top.HIDDEN is null or not an object" on line 3 & 0 (when I click the link).
Frameset:
<HTML>
<TITLE>Assignment 9.2</TITLE>
<FRAMESET ROWS="0,*", FRAMEBORDER=NO BORDER=0 FRAMESPACING=0>
<FRAME NAME="HIDDEN" SRC="java.htm">
<FRAME NAME="MAIN" SRC="main.htm" MARGINHEIGHT=0 MARGINWIDTH=0>
</FRAMESET>
</HTML>
Main.htm:
<html>
<head><title>Assignment 9.2</title>
</head>
<body onload="Javascript:top.HIDDEN.scrollingMsg()"><center>
<h1>Assignment 9.2<br></h1>
<FORM Name="msgForm">
<INPUT Type="text" Name="scrollingMsg" Size="23">
</FORM><br><br>
<A HREF="Javascript:top.HIDDEN.alertMessage();">click here</A>
</body>
</html>
java.htm:
<HTML>
<script LANGUAGE="Javascript">
<!-- Hide from old browsers
scrolling message function
var scrollMsg = " *Welcome to Assignment 9.2!* "
var msgSpace = "--- ---"
var beginPos = 0
function scrollingMsg() {
document.msgForm.scrollingMsg.value = scrollMsg.substring(beginPos,scrollMsg.length)+msgSpace+scrollMsg.substring(0,beginPos)
beginPos = beginPos + 1
if (beginPos > scrollMsg.length) {
beginPos = 0
}
window.setTimeout("scrollingMsg()",200)
}
function alertMessage() {
alert('You clicked the link!');
}
-->
</SCRIPT>
</HTML>
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