I had fun writing this one

My current client asked me to allow users to paste text into textboxes/textareas, but that the pasted text should be cleaned from '<...>' tags. Here's what we came up with:

    $(":input").bind('paste', function(e) {
        var el = $(this);
        setTimeout(function() {
            var text = $(el).val();
            $(el).val(text.replace(/<(.*?)>/gi, ''));
        }, 100);
    })
;

This is so simple, I'm amazed. The first part just binds a function to the paste operation applied to any input  declared on the page.

$(":input").bind('paste', function(e) {...});

In the first line, I just capture the element. Then wait for 100ms

setTimeout(function() {....}, 100);

then get the actual value from the textbox, and replace it with a regular expression that basically means replace everything that looks like '<{0}>' with ''. gi at the end are regex arguments in javascript.

/<(.*?)>/gi