14.1.html

<!-- This example is from the book _JavaScript: The Definitive Guide_.     -->
<!-- Written by David Flanagan.  Copyright (c) 1996 O'Reilly & Associates. -->
<!-- This example is provided WITHOUT WARRANTY either expressed or implied.-->
<!-- You may study, use, modify, and distribute it for any purpose.        -->
<SCRIPT>
var _console = null;

function debug(msg) 
{
    // open a window the first time we are called, or after an existing
    // console window has been closed.
    if ((_console == null) || (_console.closed)) { 
        _console = window.open("","console","width=600,height=300,resizable");
        // open a document in the window to display plain text
        _console.document.open("text/plain");
    }

    _console.document.writeln(msg);
}
</SCRIPT>


<!-- Here's an example of using this script -->
<SCRIPT>var n = 0;</SCRIPT>
<FORM>
<INPUT TYPE="button" VALUE="Push Me"
       onClick="debug('You have pushed me:\t' + ++n + ' times.');">
</FORM>