我正在使用jQuery Expander插件。我希望它使用像jQuery的slideUp和slideDown这样的效果，而不是默认的fadeIn。
有人可以告诉我该怎么做吗？
以下是默认选项：
$.fn.expander.defaults = {
slicePoint: 100, // the number of characters at which the contents will be sliced into two parts.
// Note: any tag names in the HTML that appear inside the sliced element before
// the slicePoint will be counted along with the text characters.
widow: 4, // a threshold of sorts for whether to initially hide/collapse part of the element's contents.
// If after slicing the contents in two there are fewer words in the second part than
// the value set by widow, we won't bother hiding/collapsing anything.
expandText: 'read more...', // text displayed in a link instead of the hidden part of the element.
// clicking this will expand/show the hidden/collapsed text
expandPrefix: '… ', // text to come before the expand link
collapseTimer: 0, // number of milliseconds after text has been expanded at which to collapse the text again
expandEffect: 'fadeIn',
expandSpeed: '', // speed in milliseconds of the animation effect for expanding the text
userCollapse: true, // allow the user to re-collapse the expanded text.
userCollapseText: '[collapse expanded text]', // text to use for the link to re-collapse the text
userCollapsePrefix: ' ', // text to come before the re-collapse link
beforeExpand: function($thisEl) {}, // function that is called immediately upon expanding, before the expand occurs
afterExpand: function($thisEl) {}, // function that is called after the details have finished expanding
onCollapse: function($thisEl, byUser) {} //function that is called when the details are collapsed (immediately after)
};