动态更改TD标签的ID不是永久的

我想动态更改TD标签的Id。我试过如下动态更改TD标签的ID不是永久的

var div_node;   

div_node = document.getElementById(old_id); 

div_node.id = new_id;

但是改变ID的效果并不是永久性的。如果在此之后我写了一些语句，它只给出原始ID。我的意思是如果我确实提醒（div_node.id），它会给出原始的Id Only。

这是我的整个计划。

jsAnim.js是JavaScript库。我已包括它。可在 http://jsanim.com/

<html> 
<head> 
    <script type="text/javascript" src="jsAnim.js"> </script> 

     <script> 

     function Assign_id() //This function Will execute onload 
     { 
     j=0; 
     for(i=1;i<4;i++)C 
     { 
      document.getElementsByTagName("td")[j].setAttribute("id",i); 
      //alert(document.getElementsByTagName("td")[j].id); 
      j++; 
     } 
     } 

     function getdata() 
     { 
      var old_id=prompt("Enter Box Id."); 
      var new_id=prompt("Enter New Position"); 
      animate(old_id,new_id); 
      change_id(old_id,new_id); 

     } 

     function animate(old_id,new_id) 
     { 
      var manager=new jsAnimManager(); 
      obj=document.getElementById(old_id); 
      obj.style.position="relative"; 
      var anim=manager.createAnimObject(old_id); 
      anim.add({property: Prop.top, to: 100, duration: 2000}); 
      anim.add({property: Prop.left, to: ((new_id-old_id)*50)+4, duration: 2000}); 
      anim.add({property: Prop.top, to: 0, duration: 2000}); 

      obj=document.getElementById(new_id); 
      obj.style.position="relative"; 
      var anim=manager.createAnimObject(new_id); 
      anim.add({property: Prop.bottom, to: 100, duration: 2000}); 
      anim.add({property: Prop.right, to: ((new_id-old_id)*50)+4, duration: 2000}); 
      anim.add({property: Prop.bottom, to: 0, duration: 2000}); 
     } 

     function change_id(old_id,new_id) 
     { 
      var div_node; 
      div_node = document.getElementById(old_id); 
      div_node.id = new_id; 
      alert(div_node.id);  //HERE IT IS GIVING CORRECT CHANGED ID; 

      var div_node1 = document.getElementById(new_id); 
      div_node1.id = old_id; 

      alert(div_node.id);  //BUT HERE IT AGAIN GIVE ORIGINAL ID ONLY 
      alert(div_node1.id); 
     } 
    </script> 
</head> 



<body onload="Assign_id()"> 

    <table border="1" cellpadding="0" cellspacing="0"> 
    <tr> 

    <td width="50" height="100" background="pic.png"> 
    <font size="10" align="center">A</font> 
    </td> 

    <td width="50" height="100" background="pic.png"> 
    <font size="10" align="center">B</font> 
    </td> 


    <td width="50" height="100" background="pic.png"> 
    <font size="10" align="center">C</font> 
    </td> 
    </tr> 
    </table> 

    <button onclick="getdata()"> NEXT </button> 

</body> 
</html>

来源

2011-12-15 Surabhi Mutha

什么是`jsAnimManager`？ – Neal 2011-12-15 14:16:14

什么是`jsAnim.js`，不能只留下代码，可能是一个问题，还有你交换ID的原因是什么？为什么不去上课呢？（样式/位置？） – Jakub 2011-12-15 14:21:29