I have 3? 5? files with lumps of java tracing code in.
THIS IS THE INDEX / DIRECTORY to my trace files.

(My "testjava.html" also has useful tracing functions in it, but only for DOM
stuff.)

There are three writing methods:
1) alert();   / pops up a window, done by Java
2) Edit DOM tree: reserve a place on the web page by pre-putting an HTML
   area for this, and java inserts a string:
	see file 'trace1', function trace1()  [and mystudents.php]
3) Open new window and do writeln: see file 'trace3' [and DOMtrace]

====
TRACE0
General advice on tracing tactics; and:

Catch java errors [flagerror() / onerror()], so you don't miss their existence.

One-liner kind of stuff:  java snippets to copy into body of java, to get
tracing output.  E.g. how to print out stuff.

Lumps to be assimilated elsewhere.

====
TRACE1
My basic routine for inserting errmsgs into a prepared bit of a browser page.


====
TRACE2
Printing info about a given object, either java object or DOM object.
Typically insert a suitable "onclick", and pass "this".
It uses the trace1 method for output, though could easily do alert().

function prnodeJava(node) { alert(myprnode(node)); };
function prnodeJava2(node) { trace(myprnode(node)); };
// Prints short info on the node, or any Java object, given it.
//    and calls prnodeShort if DOM object

function prnodeShort(node) { trace(myprnodeshort(node) + '\n'); }
	Brief info on one DOM node: a bit more than 'prnodeJava'
	e.g. name-value, id, name, form.

function prnodeMed(node) { trace(myprnodemedium(node) + '\n'); }
	Ditto, but gives the brief info on each of: self, parent, children.

function prnodeSubtree(node) { printDOMtree(node,null,



====

TRACE3
DOM tree printing; to a new window it creates.

function prnodeSubtree(node) { printDOMtree(node,null,0); };
        // Prints subtree in a new window.

function prnodeFull(node) { printDOMtree(node, null, 1); }
        Prints ALL fields of one node-object in a new window.
	Good for when you want the name of a field in these objects.


function supertrace(obj) {  // Opens a window and does a 4 part inspection of
the object:
a)	java type
b)	short summary of DOM props
c)	Subtree from object's parent downwards
d)	Full all-field print of objects' fields.