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How to get checkbox value checked and show to input element using Javascript or Jquery?

but the value is only displayed when I click on the checkbox and it does not display the pre-selected values, I want it to show the selected results even if I do not click the checkbox, please correct this code Help me or give me some example code so I can add, thank you!
<script type="text/javascript">
function thayTheLoai() {
var huunhan_theloai = [];
$.each($("input[type='checkbox']:checked"), function() {
huunhan_theloai.push($(this).val());
});
document.getElementById("input").value = huunhan_theloai.join(", ");
}
</script>
<label for="default" onclick="thayTheLoai();" class="btn btn-default">
<input type="checkbox" value="1" id="theloai1" class="badgebox" name="theloai[]" ></input>
</label>
<input id="input" type="text"></input>
<script>
$('#theloai1').prop('checked', true);
</script>
This is demo : https://anifast.com/includes/test.php, I want to not need to click the checkbox and still display the checked results

Use this code and don't forget to use jquery library.
$(document).ready(function(){
$('#theloai1').prop('checked', true);
var huunhan_theloai = [];
$.each($("input[type='checkbox']:checked"), function() {
huunhan_theloai.push($(this).val());
});
document.getElementById("input").value = huunhan_theloai.join(", ");
})
function thayTheLoai() {
if ($('input[name="theloai[]"]:checked').length > 0) {
$("#input").val(1);
}else{
$("#input").val(0);
}
}

You have 2 ways of doing it:
you update the input field from your PHP and MySQL to have the checked="checked" on the selected input fields and the run the function on load:
JS
function thayTheLoai() {
var huunhan_theloai = [];
$.each($("input[type='checkbox']:checked"), function() {
huunhan_theloai.push($(this).val());
});
$('#input').val( huunhan_theloai.join(", ") );
}
$(document).ready(function(){
thayTheLoai();
});
HTML
<label for="theloai1" onclick="thayTheLoai();" class="btn btn-default">
<input type="checkbox" value="1" id="theloai1" class="badgebox" name="theloai[]" />
</label>
<label for="theloai2" onclick="thayTheLoai();" class="btn btn-default">
<input type="checkbox" value="2" id="theloai2" class="badgebox" name="theloai[]" checked="checked" />
</label>
<input id="input" type="text"/>
if you want to update the input field using the $('#theloai1').prop('checked', true);, you should change it so that it also triggers the onchanged event on the input field like this:
$('#theloai1').prop('checked', true).trigger('change');
NOTES
this code is not tested, but it should work
make sure you write valid HTML otherwise you might get unexpected results (I fixed your HTML as well)

<label for="default" class="btn btn-default">
<input type="checkbox" value="1" id="theloai1" class="badgebox" name="theloai[]" ></input>
<input type="checkbox" value="2" id="theloai2" class="badgebox" name="theloai[]" ></input>
<input type="checkbox" value="3" id="theloai3" class="badgebox" name="theloai[]" ></input>
<input type="checkbox" value="4" id="theloai4" class="badgebox" name="theloai[]" ></input>
</label>
<input id="input" type="text"></input>
$(document).ready(function(){
$('#theloai1').prop('checked', true);
var huunhan_theloai = [];
$.each($("input[type='checkbox']:checked"), function() {
huunhan_theloai.push($(this).val());
});
document.getElementById("input").value = huunhan_theloai.join(", ");
})
$("input[type='checkbox']").on("change", function(){
checked_id = $(this).attr("id");
if ($(this).prop("checked") == true) {
$("input[type='checkbox']").each(function(){
if ($(this).attr("id") != checked_id) {
$(this).prop("checked", false);
}
})
$("#input").val($(this).val());
}else{
$("#input").val('some default value');
}
})

How to work multi input fields at once

I would like to disabled onchange by only defal4-disabl except (defalt1enabl,defalt2enabl,defal31enabl).
And work (enabled/disabled) both input fields at once?
Can any expert provide me modified Fiddle?

Here's your updated fiddle: http://fiddle.jshell.net/rbwtq/348/
This HTML:
<input name="test" type="text" id="disabled_input"/>
<br /><br />
<input name="test" type="text" id="disabled_input"/>
is changed to:
<input name="test" type="text" class="disabled_input"/>
<br /><br />
<input name="test" type="text" class="disabled_input"/>
And this JavaScript:
var defalt1enabl = $(this).val();
if(defalt1enabl == "defalt1enabl"){
$('#disabled_input').removeAttr('disabled');
}
else{
$('#disabled_input').attr('disabled','disabled');
}
is changed to this:
var selectedOption = $(this).val();
if(selectedOption == "defalt4-disabl"){
$('.disabled_input').attr('disabled','disabled');
}
else{
$('.disabled_input').removeAttr('disabled');
}

Please replace your piece of code as provided below.
For HTML:
<input name="test" type="text" class="disabled_input"/>
<br /><br />
<input name="test" type="text" class="disabled_input"/>
For Script:
$(document).ready(function() {
$('.disabled_input').attr('enabled','enabled');
$('select[name="facility"]').on('change',function(){
var defalt1enabl = $(this).val();
if(defalt1enabl == "defalt1enabl"){
$('.disabled_input').removeAttr('disabled');
}
else{
$('.disabled_input').attr('disabled','disabled');
}
});
});

JQUERY: Change value from text input having a checkbox selected

I need to change the value of a text input only if a checkbox is selected. Both inputs (text and checkbox) have the same class:
<label for="text_to_apply">Write your text: </label>
<input type="text" id="text_to_apply" name="text_to_apply" value="">
<button type="button" id="btn_apply">Change</button>
<form id="theform">
<input type="text" value="1" id="one1" class="one"><input type="checkbox" id="one1_" class="one"><br>
<input type="text" value="1" id="one2" class="one"><input type="checkbox" id="one2_" class="one"><br>
<input type="text" value="1" id="one3" class="one"><input type="checkbox" id="one3_" class="one"><br>
<input type="text" value="1" id="one4" class="one"><input type="checkbox" id="one4_" class="one"><br>
<input type="text" value="2" id="two1" class="two"><input type="checkbox" id="two1_" class="two"><br>
</form>
</div>
<script>
$('#btn_apply').click(function() {
var mytext = $('#text_to_apply').val();
if ($('#theform').find('.one input:checked')) {
$('#theform').find('.one:text').attr('value', mytext);
}
});
</script>
</body>
I am running out of ideas. Please Help!
Thanks!!

If I got your question right - it will look like this:
$('#btn_apply').click(function() {
if ($('#yourCheckboxId').is(':checked')){
$('#inputId').val('some text you want');
}
});
Here is fiddle http://jsfiddle.net/Goodluck/2XBcK/

Try
$('#btn_apply').click(function() {
var mytext = $('#text_to_apply').val();
$('#theform').find('input:checked').each(function(){
$(this).prev().val(mytext);
});
});
DEMO

There is no :text in jQuery that I'm aware of. Presuming your HTML stays the same, you can use the .prev() method to target the input before each input:checked.
$('#btn_apply').click(function() {
var mytext = $('#text_to_apply').val();
if ($('#theform').find('input:checked')) {
$('#theform').find('input:checked').prev('input').attr('value', mytext);
}
});
Fiddle: http://jsfiddle.net/willthemoor/5qmH8/

How to chang all <input> to its value by clicking a button and change it back later?

The problem: I have a page with many <input> fields (just say all are text fields)
I would like to have a button, when click on it, all input fields will become plaintext only.
e.g. <input type="text" value="123" /> becomes 123
and if I click on another button, the text will change back to
e.g. 123 becomes <input type="text" value="123" />
Is there an automatic way to scan for all the <input>s and change them all at once using javascript and jquery.
Thank you!
Edited
Seems you guys are getting the wrong idea.
Read what I have written again: e.g. <input type="text" value="123" /> becomes 123
I have value="123" already, why would I want to set the value again???
What I want is e.g.
<body><input type="text" value="123" /><input type="text" value="456" /></body> becomes <body>123456</body> and later <body>123456</body> back to <body><input type="text" value="123" /><input type="text" value="456" /></body>

Use this to go one way,
$('input').replaceWith(function(){
return $('<div />').text(this.value).addClass('plain-text');
});​​​
and this to go the other.
$('.plain-text').replaceWith(function(){
return $('<input />').val($(this).text());
});
​

Check this link http://jsfiddle.net/Evmkf/2/
HTML:
<div id='divInput'>
<input type="text" value='123' />
<br/>
<input type="text" value='456' />
<br/>
<input type="text" value='789' />
</div>
<div id='plainText' style='display:none'></div>
<div>
<input type="button" id='btnPlain' value='Make It Plain' />
<input type="button" id='btnInput' value='Make It Text' />
</div>​
Javascript:
$("#btnPlain").bind('click',function(){
$("#plainText").html('');
$("#divInput input[type=text]").each(function(index){
$("#plainText").append('<span>'+$(this).val()+'</span>');
$("#divInput").hide();
$("#plainText").show();
});
});
$("#btnInput").bind('click',function(){
$("#divInput").html('');
$("#plainText span").each(function(index){
$("#divInput").append('<input type="text" value="'+$(this).text()+'"/><br/>');
$("#plainText").hide();
$("#divInput").show();
});
});
​

Try this FIDDLE
$(function() {
var arr = [];
$('#btn').on('click', function() {
var $text = $('#inp input[type="text"]');
if( $text.length > 0){
$text.each(function(i) {
arr[i] = this.value;
});
$('#inp').html(arr.join());
}
else{
if(arr.length <= 0){
}
else{ // Add Inputs here
var html = '';
$.each(arr, function(i){
html += '<input type="text" value="' + arr[i]+ '"/>'
});
$('#inp').html(html);
}
}
});
});
​

You need to create a hidden element for each input, then use jquery to hide the input, show the hidden element and give it the inputs value.
<input type="text" value="123" id="input_1" />
<div id="div_1" style="display:none;"></div>
$("#div_1").html($("input_1").val());
$("#input_1").hide();
$("#div_1").show();

How do I get text/html between consecutive <input>s?

Since input tags aren't supposed to have closing tags, is there a simple way to extract the text/HTML in between a series of input tags? For example, for the below I want to retrieve <b>Bob and Tim</b><br>Tim <i>after</i> Bob<br>.
<div id="inputs">
<input type="text" value="bob" size="4" />
<b>Bob and Tim</b><br>
<input type="text" value="tim" size="4" />
Tim <i>after</i> Bob<br>
<input type="button" value="get textbox values" id="mybutton" />
</div>​
http://jsfiddle.net/gLEZd/5/
I can get the textbox's values, but how do I accomplish the above?

With a minor markup change you can do it easily,
HTML:
<div id="inputs">
<input type="text" value="bob" id="bob" size="4" />
<label for="bob"><b>Bob and Tim</b><br></label>
<input type="text" value="tim" id="tim" size="4" />
<label for="tim">Tim <i>after</i> Bob<br></label>
<input type="button" value="get textbox values" id="mybutton" />
</div>
JS:
$("#mybutton").click( function() {
$.each($('input[type="text"]'), function() {
alert($('label[for=' + this.id + ']').text());
});
});
DEMO
Incase if you don't like label tags, then simply wrap the contents inside a span like below,
<div id="inputs">
<input type="text" value="bob" id="bob" size="4" />
<span><b>Bob and Tim</b><br></span>
<input type="text" value="tim" id="tim" size="4" />
<span>Tim <i>after</i> Bob<br></span>
<input type="button" value="get textbox values" id="mybutton" />
</div>
And in JS,
$("#mybutton").click( function() {
$.each($('input[type="text"]'), function() {
alert($(this).next().text());
});
});
DEMO

already more or less available in the fiddle and stated in the comment. but here also the code for the others directly with a small explanation:
$("#mybutton").click( function() {
var tempContainer = $("#inputs").clone();
tempContainer.find("input").remove();
alert(tempContainer[0].innerHTML);
});​
this way the container is cloned and then the inputs get removed from the cloned container... in the end we have an innerHTML without the inputs

Not sure if this is desirable, but you can strip down to text like this:
alert ( $('#inputs').unwrap().text() );
This will also strip your <b></b> and other tags though.

$("#mybutton").click( function() {
var x = $('div#inputs :not(:input)');
$.each(x, function() {
console.log(this.innerHTML);
});
});
UPDATE
$("#mybutton").click( function() {
var x = $('div#inputs :not(:input)').filter(function() {
return this.toString();
});
console.log(x); // x is the array of DOM Object
});

Ideally, if the information is linked to the input element, you should be using <label for="">. Then you could easily access the value which is associated:
<div id="inputs">
<input id="input1" type="text" value="bob" size="4" />
<label for="input1"><b>Bob and Tim</b><br></label>
<input id="input2" type="text" value="tim" size="4" />
<label for="input2 ">Tim <i>after</i> Bob<br></label>
<input type="button" value="get textbox values" id="mybutton" />
</div>
Either:
$("#mybutton").click( function() {
$.each($('input[type="text"]'), function() {
alert($(this).next('label').text());
});
});
Or:
$("#mybutton").click( function() {
$.each($('input[type="text"]'), function() {
alert($('label[for='+this.id+']').text());
});
});