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Radiobuttons set attribute checked is not working in function

Why is this not working with JQuery?
The property wont be checked to true so or with asnyc function... I tried everything, but it only will working if i set the attribute checked true in browser at console. Not even with outsourced async callback functions.
for (var i = 0; i < user.benutzer.length; i++)
{
var user_var = user.benutzer[i].benutzer;
user_rep = user_var.replace(/ /g, '_');
$('#div_buttongroup').append('<label for="' + user_rep + '" class="btn btn-primary" id="label_'+user_rep+'"><input type="radio" class="user_radio" id="' + user_rep + '" value="' + user_var + '" name="radio" autocomplete="off"></input>' + user_var + '</label>');
if (i === 0)
{
t = user_rep;
$('#label_'+user_rep).addClass("btn btn-primary active");
$('#'+user_rep).prop("checked",true);
}
}

The difference between attributes and properties can be important in specific situations. Before jQuery 1.6, the .attr() method sometimes took property values into account when retrieving some attributes, which could cause inconsistent behavior. As of jQuery 1.6, the .prop() method provides a way to explicitly retrieve property values, while .attr() retrieves attributes.
$('#'+user_rep).attr("checked");

I think it was a JQuery bug in combination with radiobuttons. I used a selectbox and everything was working

Change attributes dynamically using jquery

I am running a loop which is appending input fields. Now, as I am using a loop, all the attributes are similars. So, when I need to grab any one of the then I am grabbing more than one field.
How do I dynamically change the attributes according to the index, so that I can grab the correct input field ?
ebs_no = data.number_ebs;
for(i=0;i<ebs_no;i++){
$('form.ebs').append("<br>EBS"+(i+1)+"</br>");
$('form.ebs').append('<br> SNAPSHOTNO <input type="text" name="'+i+'"></br>');
$('form.ebs').append('<input type="submit" name="submit">');
$('[name='+i+']').on('submit',function(){
alert($('[name='+i+']').val());
});
}

Replace this:
alert($('[name='+i+']').val());
by this:
alert($(this).val());
The code $(this) refers to the element being treated

Your are looking for event delegation.It is used for created Dynamically DOM elements and use class instead of iterare i in the loop
ebs_no = data.number_ebs;
for (i = 0; i < ebs_no; i++) {
$('form.ebs').append("<br>EBS" + (i + 1) + "</br>");
$('form.ebs').append('<br> SNAPSHOTNO <input type="text" class="someClass" name="' + i + '"></br>');
$('form.ebs').append('<input type="submit" name="submit">');
$('[name=' + i + ']').on('submit', function () {
alert($('[name=' + i + ']').val());
});
}
$(document).on('submit', '.someClass', function () {
alert($(this).val());
});

Radio Input gets unchecked after jQuery html operation

I'm getting an extremely weird error. My radio button gets unchecked after doing the following operations:
var $page = $('[data-shortcode-page="' + shortcode + '"]', $webrock).html();
//CHECKED
console.log($('[data-shortcode-page="' + shortcode + '"] :checked', $webrock).length)
$('.webrock-page-content', $addPage).replaceWith($page);
//UNCHECKED
console.log($('[data-shortcode-page="' + shortcode + '"] :checked', $webrock).length)
Does anyone know why this is happening? Here's a jsFiddle: http://jsfiddle.net/mVB2q/1/
Thank you very much!

You are cloning a radio group with the same name. You need to update the name of the cloned radio group. Here is a simple solution where I am hardcoding in "test1" for the new group name, but you may want to modify it to fit your needs:
var shortcode = 'object';
var $page = $('[data-shortcode-page="' + shortcode + '"]');
console.log($('[data-shortcode-page="' + shortcode + '"] :checked').length);
//after cloning the radio buttons, find radio buttons and update the name attribute.
$('.webrock-page-content').html($page.clone().find("input[type='radio']").attr("name", "test1").end().html());
console.log($('[data-shortcode-page="' + shortcode + '"] :checked').length);
Updated fiddle.

how to delete a value between <input> tags?

I'm creating checkboxes using JQuery as following:
$('<input type="checkbox" ' + 'id=' + (i+1) + '>' + (i+1) + '</input><br/>')
Then later it is removed whenever the user checks the box in:
if (this.checked) {
$(this).remove();
}
However, The input box is deleted, but the number (id) stays on the page, along the <br/> Tag, so I can see the #i there on the HTML Page.
I would like to remove them as well.
So, to in order to make my question as complete as possible, here is how the HTML is laid:
<input id="1" type="checkbox">
1
<br>
Could someone please give me a clue how to remove #i and <br/> from the page?
Thanks

as stated by other answers - input don't have closing tags
You will still need to remove all id and <br />. You can find those with .next() function in jquery. You should put your id in <label> or <span>.
Then. for example:
$(this).next('label').remove();
$(this).next('br').remove();
$(this).remove();
Code can be written shorter but it's for you to see how it works.

The text in <input> text boxes is not set with a textnode (like for textareas), but with the value attribute. (Sorry for the confusion)
Yet, you want to have a checkbox. Best, create a <label> for it, instead of a text node plus a <br /> (which is not handleable with jQuery):
<div class="inputcell">
<input type="checkbox" id="check5">
<label for="check5">5</label>
</div>
With this DOM, you can easily remove the whole box by $("#check5").parent().remove(). Note that single numbers are no valid element ids.

that's because input tags don't have closing tags and remove ignores everything after the >, change this:
$('<input type="checkbox" ' + 'id=' + (i+1) + '>' + (i+1) + '</input><br/>')
to:
$('<input type="checkbox" ' + 'id=' + (i+1) + 'value="' + (i+1) +'"><label>'+ (i+1) +'</label>')
$(this).next('label').andSelf().remove();

input tags don't have closing tag, to create a checkbox you just need the following:
$('<input type="checkbox" ' + 'id=' + (i+1) + '>');
and if you want also to use a label for that checkbox, create appropriate label or any other element, because you can't put closign tag for input and a text between them

How to update value of a radio using Jquery

I have this HTML code for radios:
<input type='radio' name='a_27' value='Yes' id='a_27_0' />
<input type='radio' name='a_27' value='No' id='a_27_1' />
I'm trying to set the selected value of the radio using this code:
var field="a_" + this.id;
$('[name="' + field + '"]').val(this.value);
console.log("name is " + field + ", val is " + this.value);
However it doesn't work, nothing happens when this runs. Here's the output from Firebug's console which occurs after the 3rd line:
name is a_27, val is Yes
Any ideas?
I would prefer a method which would also work on <select>s, so I wouldn't need to write additional/seperate code for radios and selects.
Edit: A weird problem I've noticed that although my html code gives a different value (yes/no), in firebug it shows both radios as having the value 'yes'. If I select no and click save, the javascript function still receives 'yes' instead of no. Am I doing something wrong?
Edit 2: The full function:
function processMultiOptAnswers()
{
$.each(multiOpts,function()
{
var field="a_" + this.id;
console.log("name is " + field + ", val is " + this.value);
$('[name="' + field + '"]').val(this.value);
}
);
}

your log should be if this.value is different.
$('[name="' + field + '"]').val(this.value);
console.log("name is " + field + ", val is " + $('[name="' + field + '"]').val());
To make it selected
$('[name="' + field + '"]').attr("checked", "checked");
I haven't tested this, but you might have to remove that attribute from the other ones.