Javascript - properties for any HTML object

Sometimes you need to see what properties can you use for any given object.
Just copy-paste this:

var stuff = '';
for (p in document.Form1.elements)
stuff = stuff + ' ' + p;
alert(stuff);

( ... and replace the document.form1.elements with anything you'd like. For example document.body, or document.getElementById("someTDfromYourTable"), etc. ...)