Better Broken Image Handling

Missing images will either just display nothing, or display a [ ? ] style box when their source cannot be found. Instead you may want to replace that with a "missing image" graphic that you are sure exists so there is better visual feedback that something is wrong. Or, you might want to hide it entirely. This is possible, because images that a browser can't find fire off an "error" JavaScript event we can watch for.

// Replace source
$('img').error(function(){
        $(this).attr('src', 'missing.png');
});

// Or, hide them
$("img").error(function(){
        $(this).hide();
});

Change WMode with jQuery

If you don't set the wmode on a flash embed it will float over the top of an overlay which can be a pretty big deal. This is ideal in environment with lots of legacy video code or where users will be posting new code and teaching them about wmode is a lost cause. This should work in all browsers.

$("embed").attr("wmode", "opaque");
var embedTag;
$("embed").each(function(i) {
       embedTag = $(this).attr("outerHTML");
       if ((embedTag != null) && (embedTag.length > 0)) {
               embedTag = embedTag.replace(/embed /gi, "embed wmode="opaque" ");
               $(this).attr("outerHTML", embedTag);
       } else {
               $(this).wrap("<div></div>");
       }
});