From http://www.gistboxapp.com/clipper-tutorial/

new_gist_file

function throttle( fn, time ) {
    var t = 0;
    return function() {
        var args = arguments, ctx = this;
        clearTimeout(t);

        t = setTimeout( function() {
            fn.apply( ctx, args );
        }, time );
    };
}
*italic*