📄 p598_nav_only_property_watch.htm

📁 javascript source code part2

💻 HTM

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<HTML><BODY><SCRIPT>
function display_it(id,oldval,newval)
{
  document.write('test.' + id + ' was: ' + oldval + ' - now is: ' + newval +'<BR>');
  return newval;
}

var test = new Object;

test.watch("prop", display_it);       // start watching property "prop"
test.prop = "first";
delete test.prop;                     // still watch even with the property gone
test.prop = "second";
test.unwatch('prop');                 // stop watching property "prop"
test.prop = "third";

</SCRIPT></BODY></HTML>

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