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delay(duration,[queueName])
概述
设置一个延时来推迟执行队列中之后的项目。
jQuery 1.4新增。用于将队列中的函数延时执行。他既可以推迟动画队列的执行，也可以用于自定义队列。
参数
duration,[queueName]Integer,StringV1.4
duration:延时时间，单位：毫秒
queueName:队列名词，默认是Fx，动画队列。
示例
描述:
在.slideUp() 和 .fadeIn()之间延时800毫秒。
HTML 代码:
<div id="foo /">
jQuery 代码:
$('#foo').slideUp(300).delay(800).fadeIn(400);