Solved

Using DOM to create text link that uses javascript

Posted on 2009-07-10
6
290 Views
Last Modified: 2013-11-19
I have a function that edits a row so that when the user clicks a text note link, the text note becomes a textbox with the text within it.  When the user clicks the new + button, another javascript function is called that does the opposite.  It takes the text in the textbox and makes it linked text.  
The original anchor tag for the link was like:  <a href="#" onclick="javascript:editNote(this.parentNode.parentNode.rowIndex)">.

Now, I'd like to have a similar link so the user can re-change the text he just edited.  Instead, when I click the link that's created from textbox, it just brings me to the top of the page.  Please look at the code and tell me what I'm doing wrong.

The code below shows just a single row in the table, but there may be multiple rows.

Thank you in advance,
Chris
<script language="javascript">
        function editNote(noteId, rowIndex) {
            var tblRef = document.getElementById("noteTbl");
            var row=tblRef.rows[rowIndex];
            var currLink = row.cells[0].innerHTML;
            var currVal = currLink.substring(currLink.indexOf('">')+2, currLink.toUpperCase().indexOf("</A>"));
            //Delete the cell that contains the link
            row.deleteCell(0);
            //Now insert a cell and create the text box that will go in its place for user to edit
            newCell = row.insertCell(0);
            newText = document.createElement("input");
            newText.type = "text";
            newText.size = "60";
            newText.className = "text";
            newText.id = "noteEdit";
            newText.value = currVal;
            newCell.appendChild(newText);
            //Add the spaces between the textbox and button
            newText = document.createTextNode(" ");
            newCell.appendChild(newText);
            newText = document.createTextNode(" ");
            newCell.appendChild(newText);
            //Now create and add the button
            newBtn = document.createElement("input");
            newBtn.type="button";
            newBtn.id = "editNote";
            newBtn.value = "+";
            newBtn.onclick = function() {editNoteDB(rowIndex, noteId);}
            newCell.appendChild(newBtn);
        }
        function editNoteDB(rowID, noteID) {
            //This function will call the ASP page (via
            //ajaxFunction) to edit the note in the database.
            newValue = document.getElementById("noteEdit").value;
            var tblRef = document.getElementById("noteTbl");
            var row = tblRef.rows[rowID];
            row.deleteCell(0);
            newCell = row.insertCell(0);
            newText = document.createTextNode(newValue);
            link = document.createElement("a");
            link.href="#";
            link.onclick = "javascript:editNote("+noteID+",this.parentNode.parentNode.rowIndex);";
            link.appendChild(newText);
            newCell.appendChild(link);
        }
</script>
<body>
    <table id="noteTbl">
        <tr>
            <td><a href="#" onclick="javascript:editNote(9003,this.parentNode.parentNode.rowIndex);return false;">STRAIGHT THROUGH ASSEMBLY.</a></td>
        </tr>
    </table>
</body>

Open in new window

0
Comment
Question by:chrscote
  • 4
  • 2
6 Comments
 

Expert Comment

by:tsibusha
ID: 24827222
The "#" in a URL (used in the href attribute) means a point within the page. For example, page.htm#chapter1, page.htm#chapter2, etc.

"javascript:" is a syntax for URLs, instead of "http:". So to create the link, you don't need "onclick" at all. All you need is:


link.href = "javascript:doSomething()"

Open in new window

0
 

Author Comment

by:chrscote
ID: 24850564
By putting the javascript call in the href, I am getting an error when determining the rowIndex of the table.  I get the error message: 'this.parentNode.parentNode.rowIndex' is null or not an object.  If it is in the onclick event, however, this works.
0
 

Author Comment

by:chrscote
ID: 24858434
OK, I've decided to try something else.  Since I'm using ASP to create the original list, I am going to use a counter to include the "rowIndex" rather than using the .rowIndex property.  This appears to work, though I was hoping for more generic code that could be used when I'm not using ASP.
0
Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 

Expert Comment

by:tsibusha
ID: 24860099
You mean, using rowIndex to identify the link? A <tr> object always has a rowIndex that you can access and use. You don't need ASP for this.
0
 

Author Comment

by:chrscote
ID: 24865084
What I mean is that, when I try to use
<a href = "javascript:editNote(9003, this.parentNode.parentNode.rowIndex)">,
I get an error saying that parentNode.parentNode doesn't exist.  However, if I just use ASP to determine which row I'm in so that the link appears as::
<a href = "javascript:editNote(9003, 3)">
It works fine.  I've tried using just this.parentNode.rowIndex as well as simply this.rowIndex as well with the same issues.

Chris
0
 

Accepted Solution

by:
chrscote earned 0 total points
ID: 24960553
I've never received an accepted solution, so I will close it now.
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When you work with shopping cart / ecommerce relates web sites, you need to pass the certain form post details to the payment gateway process page with required details for the products items you give to order. Also you may need to track the ordered…
JavaScript has plenty of pieces of code people often just copy/paste from somewhere but never quite fully understand. Self-Executing functions are just one good example that I'll try to demystify here.
The viewer will learn how to dynamically set the form action using jQuery.
The viewer will learn how to look for a specific file type in a local or remote server directory using PHP.

792 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question