An excellent JavaScript tree

Implementing a JavaScript tree is one of those really vexing challenges. Some implementations limit your ability to nest nodes deep into the tree or are awkward in other ways.

I think this is the best solution I've seen so far.

http://www.destroydrop.com/javascripts/tree/


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Printing the contents of a IFrame whose content changes dynamically

One of the problems that vexed me recently was how to print

the contents of an IFrame when the content changes dynamically.

1. Here is my solution:
   
   Declare a DIV area in the body of the HTML document with an ID attribute value of
   "IFrameArea".
   
   Declare a JavaScript function that dynamically assigns an IFrame as the innerHTML
   property of the DIV. Note that the dimensions of the IFrame are small. This
   has the effect of making it invisible.

function PrintIFrame(SRC)

{
var URL;

URL = (SRC).toString();

document.getElementById('IFrameArea').innerHTML = "<iframe src='"

+ URL + "' height='1' width='1' frameborder='0' ID='MyIFrame' name='MyIFrame'>
</iframe>"

}

3. The document that is loaded in the IFrame should have an “onLoad” event
   handler declared
   
1. onLoad="javascript:PrintDocument()"
   delcared in the "Body" tab
   
4. The document that is loaded in the IFrame should have a a function to perform
   the printing

function SetupToPrint()

{
parent.frames.PrintCounter.focus();
window.print();
}

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