​x
 
<!DOCTYPE html>
<html>
<body>
​
<p>单击该按钮可循环遍历对象的属性。</p>
​
<button onclick="myFunction()">试一试</button>
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<p id="demo"></p>
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<script>
function myFunction() {
  var person = {fname:"John", lname:"Doe", age:25}; 
  
  var text = "";
  var x;
  for (x in person) {
    text += person[x] + " ";
  }
  document.getElementById("demo").innerHTML = text;
}
</script>
​
</body>
</html>
​