easyui window自动居中(修复了iframe弹窗被遮盖问题)

$.extend($.fn.window.defaults, {
        onOpen:function(left, top){
            var iframeWidth = $(this).parent().parent().width();
            var iframeHeight = $(this).parent().parent().height();
            var windowWidth = $(this).parent().width();
            var windowHeight = $(this).parent().height();
            var setWidth = (iframeWidth - windowWidth) / 2;
            var setHeight = (iframeHeight - windowHeight) / 2;
            $(this).parent().css({
                left: setWidth,
                top: setHeight
            });
            if (iframeHeight < windowHeight)
            {
                $(this).parent().css({
                    left: setWidth,
                    top: 0
                });
            }
            $(".window-shadow").hide();
        }
});