TMP notes on experiments on java.

============== alert() ==============
alert()->null;, confirm(),-> true/false; prompt(str, str2)-> str

Java:
var r=confirm("Press a button");  confirm() returns true or false; depending
	on user pressing OK or cancel in the box.
var s = prompt() returns user-entered string, unless <cancel> pressed.

HTML:
<input type="button" onclick="show_confirm()" value="Show confirm box" />

============== is-defined   ==============
isdefined(var): is that var def?
if(typeof yourFunctionName == 'function') does it exist
if(typeof myVar != 'undefined') then it is decl (w/w/o a value)
if ("name" in window ) then name is decl i.e. window.name is valid ptr.

instanceof()
if (t1==undefined)  shows that t1 exists, but has no value.

o.prop === undefined is the way to go, or typeof(o.prop) == 'undefined'
	IFF you know 'o' is defined.
o.prop == undefined is true if o.prop is defined, with the value null

if (SomeObject.foo)   works in javascript i.e. only true if var decl, and
value assigned, and value not false/0/etc.
NO: if (myvar) will throw an error if myvar is not decl.
but if (window.myvar) will not be an err., just false.


============== Browser cmds   ==============
document.execCommand("cmd"

============== Window obj.   ==============
window.blur() .focus()
window.find()  .back(), .forward()
Has win.frames <a window>

'window' seems to be:
	a) top java object = global scope.
	b) one particular window
	c) a frame
A frame is an HTML and a DOM object, and hence a java object; and its field 
	'myframe.contentWindow' returns the window object.
Window is not a DOM object, but a browser obj.
'window.self' is field that points to itself; and 'self' gets de-reffed to
'window.self'.

The properties about whether the window is scrolling seems not to be settable
via the window object.  But the size probably can be and by 'resizeBy()';
and the position on the screen; and the (html) name.
and focus(), blur() are about focus between windows.

mywin.focus();  // bring it to front.
	But may have to call focus() from inside win.
mywinptr.windowFocus=false; should work too but doesn't.
self.blur works in safari, it doesn't in Firefox.

Basically: the meaning of focus() is clear (seize the focus for that object
from all others); but the meaning of blur() is less so (who should get the
focus?): you need a list of the "sibs";
and particularly not clear for windows, since browsers may not let you have a
list of the windows.
So: can bring any window to the front with win3.focus() provided you have a
ptr to that window.


============== Window opening   ==============
N.B.  <BASE target="Parent_Window">  this makes all links be sent to the
named window.

============== Window opening   ==============
http://www.infimum.dk/HTML/JSwindows.html
	Good doc on open()

var mywin = window.open ("url","winName","location=0,width=300,height=214");

self.name = 'myHTMLname';  is supposed to add a name to the win.
self.name = "Parent_Window";  useful so code in another window can refer to it.

window.self: returns "current window"
window.top: returns the topmost frameset window
window.parent: returns the parent window (?if one win created others??
	top, parent only relevant if using frames (it said). Frames are
	multi-level hier/tree, so top isn't always parent.
window.opener: should return the window that did create it. using window.open()

window.focus() will bring it to front (but .blur() doesn't work in firefox).
window.scrollTo(100,500);

self.resizeTo(screen.width,screen.height); self.moveTo(0,0);   
	// to get it full screen.

============== FIND   ==============
window.find() pops up a dlog box for user

============== Query string building   ==============
Not built in; but can find code for function serialize() that will traverse
DOM of <form> and build it.

============== Tags   ==============

============== xx   ==============
============== xx   ==============
==============