js 获取子节点函数 (兼容FF与IE)

复制代码 代码如下:

  function getFirstChild(obj) {

  var result = obj.firstChild;

  while (!result.tagName) {

  result = result.nextSibling;

  }

  return result;

  }

  function getNextChild(obj) {

  var result = obj.nextSibling;

  while (!result.tagName) {

  result = result.nextSibling;

  }

  return result;

  }