js:获取节点相关的 nodeName,nodeType,nodeValue

getElementById()
getElementsByName()
getElementsByTagName()
hasChildNodes()
nodeName
nodeType=1元素节点/2属性节点/3文本节点
nodeValue

 1     <script type="text/javascript">
 2     //取得input元素的名字 nodeName,类型nodeType值nodeValue;
 3             var inputElement=document.getElementById("tid");
 4             var nodeName=inputElement.nodeName;
 5             var nodeType=inputElement.nodeType;
 6             //元素节点的nodeValue返回的是null
 7             var nodeValue=inputElement.nodeValue;
 8             alert(nodeName+":"+nodeType+":"+nodeValue);
 9             
10     //取得input元素属性名字nodeName,类型nodeType,nodeValue
11             var inputElement=document.getElementById("tid");
12             var typeAttrElement=inputElement.getAttributeNode("type");
13             var nodeName=typeAttrElement.nodeName;
14             var nodeType =typeAttrElement.nodeType;
15             var nodeValue=typeAttrElement.nodeValue;
16             alert(nodeName+":"+nodeType+":"+nodeValue);
17     </script>