getElementsByNa me() generates undefined ouput value in a textbox

116 New Member

I am passing a value through query string to a popup and then trying to pass it back to the main page... I store the value in a hidden input box

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 <input type="text" name="FromZip" id="FromZip" value="<% response.write(Request.QueryString("txtZipFr")) %>" />
 

and am passing it back through query string to the main page with

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 <script language="JavaScript" type="text/javascript">

   //<!--

    //opener.location.reload(true);

   //window.opener.location='bl_zip_sngl.asp?

   var x;

   x = document.getElementsByName("FromZip").value;

   alert(x);

    window.opener.location='bl_zip_sngl.asp?txtZipFr='+x

    self.close();

  // -->

</script>

It gives me undefined as the output, but when I do it like this

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 <script language="JavaScript" type="text/javascript">

   //<!--

    //opener.location.reload(true);

   //window.opener.location='bl_zip_sngl.asp?

   var x;

   document.getElementsByName("FromZip").value = 79797; //Only difference

   x = document.getElementsByName("FromZip").value;

   alert(x);

    window.opener.location='bl_zip_sngl.asp?txtZipFr='+x

    self.close();

  // -->

</script>

it at least returns a real value. Unfortunately I need to dynamically populate the box with what the user originally typed in.

Sep 4 '07 #1

Subscribe Reply

8141

pbmods

5,821

Recognized Expert Expert

Changed thread title to better describe the problem (did you know that threads whose titles do not follow the Posting Guidelines actually get FEWER responses?).

Sep 4 '07 #2

Logician

210

New Member

x = document.getEle mentsByName("Fr omZip").value;

Try reading:

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document.getElementsByName("FromZip")[0].value;

Otherwise you'll need to show the document.

Sep 4 '07 #3

rrocket

116

New Member

I tried that, but it gave me a null or not an object error...

Sep 4 '07 #4

gits

5,390

Recognized Expert Moderator Expert

hi ...

when do you call the js? for all dom-methods the dom has to be read for use with js ... so to be sure you should do everything with the dom after the onload of the doc (body's onload) ... at this point the browser has loaded the docs-dom and you may use it reliably ...

kind regards

Sep 4 '07 #5

rrocket

116

New Member

The javascript is called in the last statement just before everything is sent back to the main window... I am not sure that is what you are asking or not. I am mainly trying to pull just the values in the hidden text boxes. I know they are coming up since I have the input boxes set to text instead of hidden at the moment.

I can send the entire page if you think that will help.

Sep 4 '07 #6

gits

5,390

Recognized Expert Moderator Expert

it would help ... ;) ... but for simplicity ... and to simplify the problem for yourself you should try to create an example that contains the relevant things you have problems with ... during this simple step you might find out the problem for yourself and you will learn with every step you take in that direction ... i promise ... but you may also post the full code in case it is not TOO much ;))

kind regards

ps: try posts #3 solution again ... i think it should work ...

Sep 4 '07 #7

rrocket

116

New Member

I pull most of the stuff that does not have anything to do with the issue... I can alway cut more out if needed.

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<%

    IF (request.Form("op") <> 1) THEN         

%>
 
<html xmlns="http://www.w3.org/1999/xhtml">

    <head>

        <title>Add A Description</title>

            </head>

    <body>
 
        <form action="AddNewDescription.asp" method="post" onsubmit="return validate_form()" name="newDescription">

        <!--<form action="BL_ZIP_SNGL.asp" method="post" onsubmit="return validate_form()" name="BL_Zip_Sngl">-->

            <table cellpadding="1" cellspacing="0" bgcolor="#000000" width="250">

                <tr>

                    <td>

                        <table width="100%" cellpadding="5" cellspacing="0" bgcolor="#FFFFFF">

                            <tr bgcolor="#AC0636">

                                <td colspan="2" style="height: 15px"><span style="font-size: 9pt; font-family: @Arial Unicode MS; color: #ffffff;"><strong>

                                        Add a description</strong></span></td>

                            </tr>

                            <tr bgcolor="#FFFFFF" style="color: #000000">

                                <td>

                                    <strong><span style="font-size: 10pt; font-family: @Arial Unicode MS">Description:</span></strong></td>

                                <td style="text-align: right"><input type="text" name="description"/></td>

                            </tr>

                            <tr style="color: #000000">

                                <td>

                                    <span style="font-size: 10pt; font-family: @Arial Unicode MS"><strong>NMFC #:</strong></span>

                                 </td>

                                <td style="text-align: right"><input type="text" name="nmfc"/></td>

                            </tr>

                            <tr>  

                                <td width="100%" colspan="2" valign="top"><font size="2">If you need help with your NMFC # please call 1-866-633-8236</font></TD>                

                            </TR>

                            <tr bgcolor="#CCCCCC" style="color: #000000">

                                <td colspan="2" style="text-align: right"><input type="submit" value="Submit" /></td>

                            </tr>

                        </table>

                    </td>

                </tr>

            </table>

            <div>zipfr:<%response.write(Request.QueryString("txtZipFr"))%></div>

             <div>zipto:<%response.write(Request.QueryString("txtZipTo"))%></div>

             <input type="text" name="FromZip" id="FromZip" value="<%response.write(Request.QueryString("txtZipFr"))%>" />

             <input type="text" name="ToZip" id="ToZip" value="<%response.write(Request.QueryString("txtZipTo"))%>" />

            <input type="hidden" name="op" value="1" />

            <input type="hidden" name="id" value="<% response.write(Request.QueryString("id")) %>" />
 
        </form>

    </body>

</html>

<%

    ELSE

        DescAdd()

%>

<script language="JavaScript" type="text/javascript">

   //<!--

    //opener.location.reload(true);

   //window.opener.location='bl_zip_sngl.asp'

   //var x = 0;

   //document.getElementsByName('FromZip').value = 79797;

   vFromZip = document.getElementsByName("FromZip").value;

   vToZip = document.getElementsByName("ToZip").value;

   alert(vToZip);

    window.opener.location='bl_zip_sngl.asp?txtZipFr='+ vFromZip + '&txtZipTo=' + vToZip;

    self.close();

  // -->

</script>

<%

    END IF

%>

Sep 4 '07 #8

pbmods

5,821

Recognized Expert Expert

Heya, Rocket.

Try post #3's solution.

document.getEle mentsByName() has "Elements" [plural] in it, which would imply that it is returning multiple Elements.

Sep 4 '07 #9

gits

5,390

Recognized Expert Moderator Expert

hi ...

as i said ... try posts #3 solution again:

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document.getElementsByName('whatever_name');

returns a collection (list) of elements ... so

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document.getElementsByName('whatever_name')[0].value;

returns the value of the first node with the given name ...

kind regards

Sep 4 '07 #10

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