13-3.js

来自「java应用代码和章节代码。各种功能实现效果。很值」· JavaScript 代码 · 共 55 行

function walkChildNodes(objRef, n) {
 var obj;
 if (objRef) {
  if (typeof objRef == "string") {
   obj = document.getElementById(objRef);
  } else {
   obj = objRef;
  }
 } else {
  obj = (document.body.parentElement) ? 
  document.body.parentElement : document.body.parentNode;
 }
 var output = "";
 var indent = "";
 var i, group, txt;
 if (n) {
  for (i = 0; i < n; i++) {
   indent += "+---";
  }
 } else {
  n = 0;
  output += "Child Nodes of <" + obj.tagName;
  output += ">\n=====================\n";
 }
 group = obj.childNodes;
 for (i = 0; i < group.length; i++) {
 output += indent;
 switch (group[i].nodeType) {
 case 1:
  output += "<" + group[i].tagName;
  output += (group[i].id) ? " ID=" + group[i].id : "";
  output += (group[i].name) ? " NAME=" + group[i].name : "";
  output += ">\n";
  break;
 case 3:
  txt = group[i].nodeValue.substr(0,15);
  output += "[Text:\"" + txt.replace(/[\r\n]/g,"<cr>");
  if (group[i].nodeValue.length > 15) {
   output += "..."; 
  }
  output += "\"]\n";
  break;
 case 8:
  output += "[!COMMENT!]\n";
  break;
 default:
  output += "[Node Type = " + group[i].nodeType + "]\n"; 
 }
 if (group[i].childNodes.length > 0) {
  output += walkChildNodes(group[i], n+1);
 }
}
return output;
}