IE7: How to block F1 key to show windows help in java applet?

Question
My applet use F1 shotcut key in each popup dialog(JDialog) to show application
help, IE6 works correct, but IE7 shows windows help also besides
applicaiton help.
By the way, when applet got the focus, the windows help do not popped up
when press F1 key. Who can help me?
The owner of the JDialog is sun.plugin.viewer.frame.IExplorerEmbeddedFrame
which is get by the following code:
Frame jFrame = null;
Container f = getParent();
while ((f != null) && (!(f instanceof Frame)))
f = f.getParent();
if (f == null)
jFrame = new Frame();
else
jFrame = (Frame)f;
} //else

In my testing, I found out that this works in IE7:
<body onhelp="return false;">
But if you call a function that returns false, then it doesn't work, i.e., the following doesn't work:
function donothing() {
return false;
<body onhelp="donothing();">
In the applet codes, this seems to be a problem only when the dialog owner is IExplorerEmbeddedFrame. When I set the owner to null, then pressing F1 no longer pops up IE help window.
Edited by: bkyd on May 8, 2008 2:06 PM

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