using document.writeln() across frames

qwqwqwqwq · Apr 26, 2004

hello; I have:

frameset with

Code:

<frame name='a' src='a.htm'>
<frame name='b' src='b.htm'>

frame a

Code:

<script language='javascript' type='text/javascript'>
for (i=0 ; i<10 ; i++)
  { top.b.printer(i + '<br/>');
  };
</script>

frame b

Code:

<script language='javascript' type='text/javascript'>
function printer(message)
  { document.writeln(message);
  };
</script>

for i=0 everything works;
but after the first loop I get "object doesn't support this property or method";

I should note that if I merely put

Code:

<script language='javascript' type='text/javascript'>
for (i=0 ; i<10 ; i++)
  { document.writeln(i + '<br/>');
  };
</script>

into a non-frameset html there are no problems;

any thoughts?
thanks
Shannon Burnett
Asheville NC USA

vongrunt · Apr 26, 2004

Because document.write*() overwrites body and printer() destroys itself. Move printer() out of frame b and things should work fine.

qwqwqwqwq · Apr 26, 2004

vongrunt;

yes I did what you said - I removed the printer() and in frameA said

Code:

<script language='javascript' type='text/javascript'>
for (i=0 ; i<10 ; i++)
  { top.b.document.writeln(i + '<br/>');
  };
</script>

which does work;

but why does

Code:

<script language='javascript' type='text/javascript'>
for (i=0 ; i<10 ; i++)
  { document.writeln(i + '<br/>');
  };
</script>

ALSO work if it is in a non-frameset html;
shouldn't it, for the same reasoning as you mentioned above, NOT work - that it gets written over after the first call?

thanks
Shannon Burnett
Asheville NC USA

vongrunt · Apr 26, 2004

If you call javascript on-the fly:

Code:

Text before<br>
<script language="javascript">
for(i=0;i<10; i++) document.writeln( i + "<br/>" );
</script>
Text after<br>

... output will be inserted. But once document is loaded:

Code:

<body onload="blah()">
Some text before and after
<script language="javascript">
function blah() {	for(i=0;i<10; i++) document.writeln( i + "<br/>" ); }
</script>

... first document.write*() rewrites document from scratch.

qwqwqwqwq · Apr 26, 2004

wow;

is that part of a JS protocol or is it just the nature of write*() functions?

vongrunt · Apr 26, 2004

AFAIK this is nature of write*() functions by DOM specification - see methods here:

http://www.mozilla.org/docs/dom/domref/dom_doc_ref.html

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using document.writeln() across frames

qwqwqwqwq

Technical User

vongrunt

Programmer

qwqwqwqwq

Technical User

vongrunt

Programmer

qwqwqwqwq

Technical User

vongrunt

Programmer

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