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Views: 2627 | Replies: 17 | Solved
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Join Date: Jun 2006
Location: India
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Originally Posted by jakesee 
I need to change the names to
hobby[0], hobby[1], hobby[2], hobby[3] ...
so that I can pass POST the values to a PHP script...
Maybe something along the lines of the following snippet. Rigorous error checking omitted for brevity.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Script-Content-Type" content="text/javascript">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Example</title>
<script type="text/javascript">
/**
* Dynamically create form elements with incremental names.
*
* @param tableId The ID of the table element.
* @param elemName The name of the element to be dynamically created.
*/
function addRow(tableId, elemName) {
if(!tableId || !elemName) return;
// Grab hold of a reference to the table element and return from the
// function if no table element exists for the given table id.
var tblElem = document.getElementById(tableId);
if(!tblElem) return;
// Insert a new row at the end of the table, a new cell at the start
// of that row and a new text node to the newly created cell.
var newRow = tblElem.insertRow(-1);
var newCell = newRow.insertCell(0);
var txtElem = document.createElement("INPUT");
txtElem.name = elemName + "[" + (tblElem.rows.length - 1) + "]";
newCell.appendChild(txtElem);
alert(document.getElementsByTagName("BODY")[0].innerHTML);
}
</script>
</head>
<body>
<form id="frm" name="frm" action="#">
<table id="tbl">
<tbody>
<tr id="dolly">
<td><input name="hobby[0]"></td>
</tr>
</tbody>
</table>
<div>
<input type="button" value="Append" onclick="addRow('tbl', 'hobby');">
<br>
<input type="submit">
</div>
</form>
</body>
</html> I don't accept change. I don't deserve to live.
Happiness corrupts people.
Failing to value the lives of others cheapens your own.
Happiness corrupts people.
Failing to value the lives of others cheapens your own.
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Join Date: Aug 2006
Location: Noida, India
Posts: 158
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Junior Poster
Above code is working fine on FF but on IE7 name attribute is not set at all.
I had modified the above code to work on both the browsers.
I had modified the above code to work on both the browsers.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Script-Content-Type" content="text/javascript">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Example</title>
<script type="text/javascript">
/**
* Dynamically create form elements with incremental names.
*
* @param tableId The ID of the table element.
* @param elemName The name of the element to be dynamically created.
*/
function addRow(tableId, elemName) {
if(!tableId || !elemName) return;
// Grab hold of a reference to the table element and return from the
// function if no table element exists for the given table id.
var tblElem = document.getElementById(tableId);
if(!tblElem) return;
// Insert a new row at the end of the table, a new cell at the start
// of that row and a new text node to the newly created cell.
var newRow = tblElem.insertRow(-1);
var newCell = newRow.insertCell(0);
//var txtElem = document.createElement("INPUT");
//newCell.appendChild(txtElem);
newCell.innerHTML = "<input type='text' name='" + elemName + "[" + (tblElem.rows.length - 1) + "]'" + ">";
alert(document.getElementsByTagName("BODY")[0].innerHTML);
}
</script>
</head>
<body>
<form id="frm" name="frm" action="#">
<table id="tbl">
<tbody>
<tr id="dolly">
<td><input name="hobby[0]"></td>
</tr>
</tbody>
</table>
<div>
<input type="button" value="Append" onclick="addRow('tbl', 'hobby');">
<br>
<input type="submit">
</div>
</form>
</body>
</html> Last edited by Luckychap : Jul 10th, 2008 at 2:16 pm.
When you think you have done a lot, then be ready for YOUR downfall.
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Join Date: Jun 2006
Location: India
Posts: 6,863
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Rep Power: 23
Solved Threads: 344
> Above code is working fine on FF but on IE7 name attribute is not set at all.
Just because the 'NAME' attribute is not shown in the alert doesn't mean that it is not set. Try to submit the form and take a look at the submitted query string i.e. the URL, it still submits the newly created form fields. Likewise the code works perfectly fine on the recent version of Opera.
Just because the 'NAME' attribute is not shown in the alert doesn't mean that it is not set. Try to submit the form and take a look at the submitted query string i.e. the URL, it still submits the newly created form fields. Likewise the code works perfectly fine on the recent version of Opera.
I don't accept change. I don't deserve to live.
Happiness corrupts people.
Failing to value the lives of others cheapens your own.
Happiness corrupts people.
Failing to value the lives of others cheapens your own.
•
•
Join Date: Jul 2008
Posts: 33
Reputation:
Rep Power: 1
Solved Threads: 1
Light Poster
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Originally Posted by ~s.o.s~
Maybe something along the lines of the following snippet. Rigorous error checking omitted for brevity.
That was finer than my original addRow code! I added another function and a button to illustrate my problem.
function TryToGetName(tableId)
{
var tblElem = document.getElementById(tableId);
if(!tblElem) return;
// this is correct, with 3 buttons
alert("total <inputs> = " + (document.getElementsByTagName("INPUT").length - 3));
for(var i = 0; i < tblElem.rows.length; i++)
{
var hobby = document.getElementsByName("hobby[" + i + "]")[0];
// But suppose I want to do validation and
// value formatting with hobby.value,
// IE will give a problem here.
alert("hobbies["+i+"].value = " + hobby.value);
}
}
The full version:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Script-Content-Type" content="text/javascript">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Example</title>
<script type="text/javascript">
/**
* Dynamically create form elements with incremental names.
*
* @param tableId The ID of the table element.
* @param elemName The name of the element to be dynamically created.
*/
function addRow(tableId, elemName) {
if(!tableId || !elemName) return;
// Grab hold of a reference to the table element and return from the
// function if no table element exists for the given table id.
var tblElem = document.getElementById(tableId);
if(!tblElem) return;
// Insert a new row at the end of the table, a new cell at the start
// of that row and a new text node to the newly created cell.
var newRow = tblElem.insertRow(-1);
var newCell = newRow.insertCell(0);
var txtElem = document.createElement("INPUT");
txtElem.name = elemName + "[" + (tblElem.rows.length - 1) + "]";
newCell.appendChild(txtElem);
alert(document.getElementsByTagName("BODY")[0].innerHTML);
}
function TryToGetName(tableId)
{
var tblElem = document.getElementById(tableId);
if(!tblElem) return;
// this is correct, with 3 buttons
alert("total <inputs> = " + (document.getElementsByTagName("INPUT").length - 3));
for(var i = 0; i < tblElem.rows.length; i++)
{
var hobby = document.getElementsByName("hobby[" + i + "]")[0];
// But suppose I want to do validation and
// value formatting with hobby.value,
// IE will give a problem here.
alert("hobbies["+i+"].value = " + hobby.value);
}
}
</script>
</head>
<body>
<form id="frm" name="frm" action="#">
<table id="tbl">
<tbody>
<tr id="dolly">
<td><input name="hobby[0]"></td>
</tr>
</tbody>
</table>
<div>
<input type="button" value="Append" onclick="addRow('tbl', 'hobby');">
<br>
<input type="button" value="getElementsByName('hobby[x]')" onclick="TryToGetName('tbl');">
<br>
<input type="submit">
<br>
</div>
</form>
</body>
</html> Last edited by jakesee : Jul 11th, 2008 at 2:43 am.
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Join Date: Jun 2006
Location: India
Posts: 6,863
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The getElementsByName seems to be flawed when working with dynamically added elements in IE. I guess adding elements by using innerHTML is the only way of making IE aware of the existence of new elements.
Anyways, try something simple like:
Anyways, try something simple like:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Script-Content-Type" content="text/javascript">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Example</title>
<script type="text/javascript">
/**
* Dynamically create form elements with incremental names.
*
* @param tableId The ID of the table element.
* @param elemName The name of the element to be dynamically created.
*/
function addRow(tableId, elemName) {
if(!tableId || !elemName) return;
// Grab hold of a reference to the table element and return from the
// function if no table element exists for the given table id.
var tblElem = document.getElementById(tableId);
if(!tblElem) return;
// Insert a new row at the end of the table, a new cell at the start
// of that row and a new text node to the newly created cell.
var newRow = tblElem.insertRow(-1);
var newCell = newRow.insertCell(0);
var txtElem = document.createElement("INPUT");
txtElem.name = elemName + "[" + (tblElem.rows.length - 1) + "]";
newCell.appendChild(txtElem);
}
function getElementsThatStartWith(frmObj, str) {
if(!str || !frmObj) return;
var elems = frmObj.elements, returnElems = [];
for(var i = 0, maxI = elems.length; i < maxI; ++i) {
var elem = elems[i];
if(elem.name.indexOf(str) == 0) {
returnElems[returnElems.length] = elem;
}
}
return(returnElems);
}
function validateHobbies(frmObj) {
var elems = getElementsThatStartWith(frmObj, "hobby");
for(var i = 0, maxI = elems.length; i < maxI; ++i) {
var elem = elems[i];
alert(elem.name + ": " + elem.value);
}
}
</script>
</head>
<body>
<form id="frm" name="frm" action="#">
<table id="tbl">
<tbody>
<tr id="dolly">
<td><input name="hobby[0]"></td>
</tr>
</tbody>
</table>
<div>
<input type="button" value="Append" onclick="addRow('tbl', 'hobby');">
<br><br>
<input type="button" value="Get All Hobbies" onclick="validateHobbies(this.form);">
<br><br>
<input type="submit">
</div>
</form>
</body>
</html> I don't accept change. I don't deserve to live.
Happiness corrupts people.
Failing to value the lives of others cheapens your own.
Happiness corrupts people.
Failing to value the lives of others cheapens your own.
•
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Join Date: Jul 2008
Posts: 33
Reputation:
Rep Power: 1
Solved Threads: 1
Light Poster
Thanks to everyone with the help and especially SOS for the neater code suggestions. I think i can solve my problems from here on already.
anyway, nice efficient for loop here:
anyway, nice efficient for loop here:
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Originally Posted by ~s.o.s~
for(var i = 0, maxI = elems.length; i < maxI; ++i) { ... }
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Join Date: Jul 2008
Posts: 1
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Newbie Poster
I dont understand you guys. There is a easier way to send array of elements.
Check this out:
And now to add/delete elements you can set id parametr. It works in IE/Fx very well.
Check this out:
<input name="something[]" /> <input name="something[]" /> <input name="something[]" />
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Join Date: Jul 2008
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Light Poster
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Originally Posted by michalsrodek
I dont understand you guys. There is a easier way to send array of elements.
Check this out:
And now to add/delete elements you can set id parametr. It works in IE/Fx very well.<input name="something[]" /> <input name="something[]" /> <input name="something[]" />
In any case, your method is indeed clever, which I just learnt recently. But the problem is illustrated below:
<script type="text/javascript">
function AddRow()
{
var hobby = document.getElementsByName('hobby[]');
alert(hobby.length);
var formObj = document.getElementById('form_form');
var i = document.createElement("input");
i.name = "hobby[]";
formObj.appendChild(i);
// doesn't work in IE when it should
var hobby = document.getElementsByName('hobby[]');
alert(hobby.length);
hobby[hobby.length - 1].value = "I am the latest input box";
// this makes validation problematic
}
</script>
<form id="form_form" method="POST">
<input type="button" value="Add Row" onclick="AddRow();" />
<input type="submit" value="submit" />
<input type="text" name="hobby[]" />
</form> Last edited by jakesee : Jul 22nd, 2008 at 11:46 am.
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