解决方法
如果你正在谈论从jQuery对象中删除节点，使用过滤器或不是函数。
See here for more。
如何使用过滤器：
var ps = $('p');
//Removes all elements from the set of matched elements that do
//not match the specified function.
ps = ps.filter(function() {
//return true to keep it,false to discard it
//the logic is up to you.
});
要么
var ps = $('p');
//Removes all elements from the set of matched elements that
//do not match the specified expression(s).
ps = ps.filter('.selector');
如何使用不：
var ps = $('p');
//Removes elements matching the specified expression
//from the set of matched elements.
ps = ps.not('.selector');
