复制代码 代码如下:

(function($){

$.fn.center = function(){

var top = ($(window).height() - this.height())/2;

var left = ($(window).width() - this.width())/2;

var scrollTop = $(document).scrollTop();

var scrollLeft = $(document).scrollLeft();

return this.css( { position : 'absolute', 'top' : top + scrollTop, left : left + scrollLeft } ).show();

}

})(jQuery)

调用方法：

复制代码 代码如下:

$('#dialog').center();