javascript获取兄弟节点二种方法

function siblings(elem) {
    var a = [];
    var b = elem.parentNode.children;
    for(var i =0,i<b.length;i++) {
        if(b[i] !== elem) a.push(b[i]);
    }
    return a;
}

siblings: function(elem){return jQuery.sibling(elem.parentNode.firstChild,elem);}

jQuery.sibling = function(n, elem){
var r = [];

for ( ; n; n = n.nextSibling ) {
if ( n.nodeType == 1 && n != elem )
r.push( n );
}

return r;
};

function sibling(elem) {
var r = [];
var n = elem.parentNode.firstChild;
for ( ; n; n = n.nextSibling ) {
    if ( n.nodeType === 1 && n !== elem ) {
        r.push( n );
    }
}
return r;
}