With jQuery document ready:

$(function(){
    var canvas = $('#testCanvas')[0];
    canvas.addEventListener('mousedown', function(e){
        e.preventDefault();
        e.stopPropagation();
        e.target.style.cursor = 'move';
    }, false);
    canvas.addEventListener('mouseup', function(e){
        e.target.style.cursor = 'default';
    }, false);
});

And without...

$('#testCanvas')[0].addEventListener('mousedown', function(e){
    e.preventDefault();
    e.stopPropagation();
    e.target.style.cursor = 'move';
}, false);

$('#testCanvas')[0].addEventListener('mouseup', function(e) {
    e.target.style.cursor = 'default';
}, false);

Based on this: http://stackoverflow.com/questions/2659999/html5-canvas-hand-cursor-problems

Using a href="javascript:void(0)" instead of a href="#" does not jump to the top. Sould have been clear, but still good to know.

return !!someValueThatisNotBooleanButShouldBe;

I first encountered it at Mark Pilgrim'sDive Into HTML5. Anyone else remembers his classic Kant Pro Generator from the olden days?

Nice way and fast way of finding the largest number in an array.

var arr = [1233, 32, 442];
var largest = Math.max.apply(Math, arr);

http://ejohn.org/blog/fast-javascript-maxmin/

http://stackoverflow.com/questions/1379553/how-might-i-find-the-largest-number-contained-in-a-javascript-array

Moving PHP Associative Array (Dictionaries, whatever..) over for use in Javascript. In JS Associative Array are actually objects, so we might as well make it into one.

echo "var data =" . json_encode($somatic, JSON_FORCE_OBJECT) . ";

Open:

/wp-includes/js/quicktags.js

Change/Add/Delete tags to your likening.

Calling JS from webViewDidFinishLoading, modifying paths to local. Before that all the images had to be stored into the local path.

http://iphoneincubator.com/blog/windows-views/uiwebview-dynamically-modify-html-documents

Interesting direction, but still looking for an elegant way to mix external sites (HTML) with local content (images, scripts...)

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