1、var childDom = document.getElementById("元素ID")
2、parentNode, childNodes
var children=empty.childNodes;
for (var i=0;i< SPAN>
...
}
3、var childDOM = document.getElementsByTagName("HTML标签类型");
var children=empty.childNodes;
for (var i=0;i< SPAN>
...
}
3、var childDOM = document.getElementsByTagName("HTML标签类型");