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Old February 8th, 2005, 05:01 AM
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Default HTML DOM - clone form element could not be aligned

I have a serious problem in dealing the form elements using HTML DOM.

Please be patient to go through this code.
Code:
<html>
<head>
    <title>Untitled</title>
    <script language="JavaScript">
    function func_insert()
    {        
        var obj_txt_1 = document.getElementById("txt_1");
        var obj_txt_1_new = obj_txt_1.cloneNode(true);
        document.frm_test.appendChild(obj_txt_1_new)

    }

    </script> 
</head>
<body>
    <form name="frm_test">
        <table id="tbl_test" cellspacing="2" cellpadding="2" border="1">
            <tr>
                <td><input type="Text" name="txt_1"></td>                
                <td><a href="javascript:func_insert()">Click</a></td>
            </tr>
            <tr>                
                <td>&nbsp;</td>
                <td>&nbsp;</td>
            </tr>
            <tr>                
                <td>&nbsp;</td>
                <td>&nbsp;</td>
            </tr>
        </table>
    </form>
</body>
</html>

What I want is to clone the textbox inside the table in a new row.I know how to add the row and put controls in it.

But when I do this with cloneNode() the form submitted doesn't have the duplicated element.

I did it using the following code.
Code:
<script language="JavaScript">
    function func_insert()
    {
        var tbl_test = document.getElementById("tbl_test");
        var rw_test = tbl_test.insertRow(-1);
        var cl_test = rw_test.insertCell(-1);
        var cl_test1 = rw_test.insertCell(-1);
        var obj_txt_1 = document.getElementById("txt_1");
        var obj_txt_1_new = obj_txt_1.cloneNode(true);
        cl_test.appendChild(obj_txt_1_new);    
    }

    </script>
Please Advise
Thanks in advance.:)



Shibu Narayanan
Software Associates
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Shibu Narayanan
Software Associates
 
Old February 8th, 2005, 05:34 AM
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Default

Firstly two textboxes should not have the same name, secondly you cannot create form elements in IE and then add a name, you need to use something like this (ugly) syntax:
Code:
function getNewElement(Type, Name)
{
  return document.createElement("<input name=\"" + Name + "\" type=\"" + Type + "\">");
}
--

Joe (Microsoft MVP - XML)
 
Old February 8th, 2005, 06:30 AM
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Default

Thanks for your reply.

I know that, by calling the method createElement() we can easily create controls in HTML DOM. But what if we have 10-15 lengthy select boxes(Can be city,country etc).
I believe creating this dynamically will relly greatly on the client machines.

So, by now, you might have got the Idea why I tried to use cloneNode.I suppose cloneNode will be a better solution rather than creating each and every element(and its options) one by one.

Got any other better solution???

Thanks


Shibu Narayanan
Software Associates
 
Old February 9th, 2005, 06:05 AM
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I don't think you will much difference between cloeNode and cretaing each eleemnt separately. As I said, the disadvantage of cloneNode is that you cannot now give the attribute a name, well you can but it won't be part of the form's submission data.

If you're concerned about the client's resources then you really have to resort to doing this server side.


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Joe (Microsoft MVP - XML)
 
Old February 9th, 2005, 06:22 AM
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Default

Sorry to disturb u again.

But Let me ask something.

Here is a mocking scenario..

Suppose that there is a form meant to add the personal details.
He may require to add his details first which we will provide from the server side as some form inputs.
After that he may require to enter his dependents details(name, relationship,date of birth etc )

can be his wife,children.

No program in this world can get the number of dependents from the server and we can never predict the number of controls for this.

I believe, in these cases, the controls must be created dynamically from the client side.

Please suggest me a better way to deal with this sort of situation.

Thanks

Shibu Narayanan
Software Associates
 
Old November 15th, 2008, 11:24 PM
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I had similar issue. There is a solution in http://www.quirksmode.org/dom/domform.html, but it wouldn't work properly as it doesn't check for child nodes in every parent, i.e.
<p><input type..../></p> is an scenario that it wouldn't work applying the solution indicated in the link.

Finally, I ended with the following code:

function ChangeNames(newFields)
{
    var newField = newFields.childNodes;
    for (var i=0;i<newField.length;i++)
    {
        ChangeNames(newField[i]);
        if (newField[i].name)
        {
            newField[i].name = newField[i].name + counter;
        }
    }
}

function moreFields()
{
    counterter++;
    var newFields = document.getElementById('readroot').cloneNode(true );
    var insertHere = document.getElementById('writeroot');
    ChangeNames(newFields);
    insertHere.parentNode.insertBefore(newFields,inser tHere);
}





Oscar E.L.





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