有时工作需要, 也是接着上一章的方法, 用js模仿jquery里的几个方法parent, parentUntil, children.
function parent(node){
return node.parentNode || null;
}
function parentUntil(node, parentNode){
while(parent(node) != parentNode){
node = parent(node);
}
return parentNode;
}
function children(parentNode){
var children,
length,
nodeArray = [],
i = 0;
if(parentNode.nodeType === 1){
children = parentNode.children || parentNode.childNodes; //兼顾一下ff3.6以下的版本, 当然也可以不考虑了, 直接用children
length = children.length;
for(; i < length; i++){
if(children[i].nodeType !== 1){
continue;
}
nodeArray.push(children[i]);
}
return nodeArray;
}
else{
return null;
}
}