简单的反跳和限制jQuery实现
用法：
debouncedFn = $.debounce(fn, timeout, [invokeAsap], [ctx]);
throttledFn = $.throttle(fn, timeout, [ctx]);
防弹示例
$('input[name=suggest]').keyup($.debounce(onKeyUp, 300));
// or
$('input').bind('keyup blur', $.debounce(process, 300));
节流的例子
$(window).resize($.throttle(doComplexСomputation, 300));
