If you go up two levels, then find the next child, you're only going down one level -- you're setting the selected class on the <li> ... ... <看更多>

I am going to show how to select an html element by jQuery first-child selector and set css on itsource code ... ... <看更多>

First, select the first child node ( firstChild ) and remove it using the removeChild() method. ... function removeAllChildNodes(parent) { while (parent. ... <看更多>

1A2A3#id4A B5#id A6.classname7A.className8Put your back into it!9A, B10*11A *12A + B13A ~ B14A > B 15:first-child16:only-child17:last-child18:nth-child(A)19 ... ... <看更多>