13-4.js

java应用代码和章节代码。各种功能实现效果。很值

function walkChildren(objRef, n) {
 var obj;
 if (objRef) {
  if (typeof objRef == "string") {
  obj = document.getElementById(objRef);
  } else {
   obj = objRef;
  }
 } else {
  obj = document.body.parentElement;
 }
 var output = "";
 var indent = "";
 var i, group;
 if (n) {
  for (i = 0; i < n; i++) {
   indent += "+---";
  }
 } else {
  n = 0;
  output += "Children of <" + obj.tagName;
  output += ">\n=====================\n";
 }
 group = obj.children;
 for (i = 0; i < group.length; i++) {
 output += indent + "<" + group[i].tagName;
 output += (group[i].id) ? " ID=" + group[i].id : "";
 output += (group[i].name) ? " NAME=" + group[i].name : "";
 output += ">\n";
 if (group[i].children.length > 0) {
  output += walkChildren(group[i], n+1);
 }
}
return output;
}