创建新的行代码功能不适用于IE8

Question

I have a code to add more row on link. This code is execute on Firefox , Chrome but not on IE-8. Generating error on IE. Error is

Unknown runtime error

Code:

addmore.php

<script type="text/javascript" language="javascript">
function addrel()
{
var xmlhttp;
    var str1=document.forms["regisration"]["count1"].value;

    if (window.XMLHttpRequest)
      {// code for IE7+, Firefox, Chrome, Opera, Safari
      xmlhttp=new XMLHttpRequest();
      }
    else
      {// code for IE6, IE5
      xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
      }
xmlhttp.onreadystatechange=function()
      {
          if (xmlhttp.readyState==4 && xmlhttp.status==200)
            {
            var taha="reladd"+str1;

            document.getElementById(taha).innerHTML=xmlhttp.responseText;
            }
       }

var str=parseInt(document.forms["regisration"]["count1"].value,10);

    xmlhttp.open("GET","addmoreRelative.php?q="+str,true);
    xmlhttp.send();
    str=str+1;
    document.forms["regisration"]["count1"].value=str;
}
</script>

<form name="regisration" method="post" enctype="multipart/form-data" action="">
         <input type="hidden" name="count" value="1"/>
         <input type="hidden" name="count1" value="1"/>

<table border="0"   > 
    <tr >
        <td><b>Surname</b></td>
        <td>&nbsp;</td>
    </tr>
    <tr>
        <td >
         <input type="text" name="rlast" id="rlast" maxlength="30" value="" />      
        </td>
         <td> <a href="javascript:void()" onClick="addrel()">Add More</a></td>
    </tr>
        <?php for($t=1;$t<=9;$t++){?><tr id="reladd<?php echo $t; ?>" ></tr><?php }?>
</table>

addmoreRelative.php

    <?php
$count=$_GET['q']; ?>

<td><input type="text" name="rlast<?php echo $count; ?>" id="rlast<?php echo $count; ?>" /></td>

Answer 1

Known issue. Updating PART of a table under IE8 and below is simply broken.

You either have to replace the entire table, or you have to use the traditional DOM table manipulation.

See JavaScript Table Manipulation for hints.