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Deleting multiple rows of a table with Jquery and ajax

I want to be able to delete checkbox-selected rows but when I click on "Delete Selected", both the table on the web page and MySQL database stay unchanged. How do I get the selected rows from both the web page and the database to be deleted?
Edit: I'm now able to delete the rows but only the first row, despite selecting more than one checkbox, or selecting another checkbox not on the first row. Also, if I want to delete another entry, I will have to first refresh the page before deleting another one.
datatable.php
<div class="row well">
<a type="button" class="delete_all btn btn-primary pull-right">Delete Selected</a>
</div>
<script type="text/javascript">
$(document).ready(function($)
{
function create_html_table (tbl_data) {
tbl +='<table>';
tbl +='<thead>';
tbl +='<tr>';
tbl +='<th rowspan="3"><input type="checkbox" id="master"></th>';
// More table headers
tbl +='</tr>';
tbl +='</thead>';
tbl +='<tbody>';
$.each(tbl_data, function(index, val)
{
var row_id = val['row_id'];
//loop through ajax row data
tbl +='<tr id="row" row_id="'+row_id+'">';
tbl +='<td><input type="checkbox" class="sub_chk"></td>';
tbl +='<td>'+(index + 1)+'</td>';
tbl +='<td><div col_name="filename">'+val['filename']+'</div></td>';
// More data
tbl +='</tr>';
});
tbl +='</tbody>';
tbl +='</table>';
}
var ajax_url = "<?php echo APPURL;?>/ajax.php" ;
// Multi-select
$(document).on("click","#master", function(e) {
if($(this).is(':checked',true))
{
$(".sub_chk").prop('checked', true);
}
else
{
$(".sub_chk").prop('checked',false);
}
});
//Delete selected rows
$(document).on('click', '.delete_all', function(event)
{
event.preventDefault();
var ele_this = $('#row') ;
var row_id = ele_this.attr('row_id');
var allVals = [];
$(".sub_chk:checked").each(function()
{
allVals.push(row_id);
});
if(allVals.length <=0)
{
alert("Please select row.");
}
else {
var data_obj=
{
call_type:'delete_row_entry',
row_id:row_id,
};
ele_this.html('<p class="bg-warning">Please wait....deleting your entry</p>')
$.post(ajax_url, data_obj, function(data)
{
var d1 = JSON.parse(data);
if(d1.status == "error")
{
var msg = ''
+ '<h3>There was an error while trying to add your entry</h3>'
+'<pre class="bg-danger">'+JSON.stringify(data_obj, null, 2) +'</pre>'
+'';
}
else if(d1.status == "success")
{
ele_this.closest('tr').css('background','red').slideUp('slow');
}
});
}
});
});
</script>
ajax.php
//--->Delete row entry > start
if(isset($_POST['call_type']) && $_POST['call_type'] =="delete_row_entry")
{
$row_id = app_db()->CleanDBData($_POST['row_id']);
$q1 = app_db()->select("select * from data where row_id='$row_id'");
if($q1 > 0)
{
//found a row to be deleted
$strTableName = "data";
$array_where = array('row_id' => $row_id);
//Call it like this:
app_db()->Delete($strTableName,$array_where);
echo json_encode(array(
'status' => 'success',
'msg' => 'deleted entry',
));
die();
}
}
//--->Delete row entry > end
I've seen other similar SO questions like this one but I don't think it is applicable to my code.
My output:

To achieve what you want, you have to select the good elements the right way. For example, an HTML id must be unique, so giving all your elements the same id="row" won't work. Using your class will be enough. Then you have to consider that each will execute the function separately for all your selected elements, so that if you want to do things for each element, all the code must be inside.
I optimized a little your code by getting rid of allVals variable, if its only goal is to test if rows have been selected, you can directly test .length on your selection. I renamed variables so that it's more clear which is what.
Also it's not very clear in the question if the "Please wait....deleting your entry" text should appear in the button or in each row, i assumed it was in the button, and it will help you differentiate all elements from how they are selected.
//Delete selected rows
$(document).on('click', '.delete_all', function(event)
{
event.preventDefault();
//'click' is called on the button, so 'this' here will be the button
var button = $(this) ;
var checked_checkboxes = $(".sub_chk:checked");
if(checked_checkboxes.length <=0)
{
alert("Please select row.");
}
else {
button.html('<p class="bg-warning">Please wait....deleting your entry</p>');
//next code will be executed for each checkbox selected:
checked_checkboxes.each(function(){
var checkbox = $(this);
var row_id = checkbox.attr('row_id');
var data_obj=
{
call_type: 'delete_row_entry',
row_id: row_id,
};
$.post(ajax_url, data_obj, function(data)
{
var d1 = JSON.parse(data);
if(d1.status == "error")
{
var msg = ''
+ '<h3>There was an error while trying to add your entry</h3>'
+'<pre class="bg-danger">'+JSON.stringify(data_obj, null, 2) +'</pre>'
+'';
//you still have to do something with your message, keeping in mind that a separate message will be generated for each separate $.post (one is emitted for each checked checkbox)
}
else if(d1.status == "success")
{
checkbox.closest('tr').css('background','red').slideUp('slow');
}
});
});
}
});

How do I change this Contact Form's Javascript so that IF a key is something else, perform different action?

I have a Contact Form that utilizes Google Scripts. It successfully sends the email and formats it decently to my inbox, but there are 2 problems:
-I need it so that IF var key is equal to 'Action', then do not display it in the email it sends. Because right now, "Action send_message" is getting included in the email and I don't like that.
For this, I have unsuccessfully tried things like:
for (var idx in order) {
var key = order[idx];
//Skip this entry into the email output if it is the Action
if( key === 'Action') {
continue
}
It seems to not react to this code at all.
-I also need it so that if a city is selected, e.g. Alachua, that the email says 'Alachua' instead of 'Florida_Alachua'. But I can't add a NAME to an option since apparently options don't have that property. I also can't do the quick fix of changing the VALUE of the <option> to resolve this step, because of other code I have that conflicts with this route.
Google Scripts Code:
/******************************************************************************
* This tutorial is based on the work of Martin Hawksey twitter.com/mhawksey *
* But has been simplified and cleaned up to make it more beginner friendly *
* All credit still goes to Martin and any issues/complaints/questions to me. *
******************************************************************************/
// if you want to store your email server-side (hidden), uncomment the next line
var TO_ADDRESS = "myemail#email.com";
// spit out all the keys/values from the form in HTML for email
// uses an array of keys if provided or the object to determine field order
function formatMailBody(obj, order) {
var result = "";
if (!order) {
order = Object.keys(obj);
}
// loop over all keys in the ordered form data
for (var idx in order) {
var key = order[idx];
result += "<h4 style='text-transform: capitalize; margin-bottom: 0'>" + key + "</h4><div>" + sanitizeInput(obj[key]) + "</div>";
// for every key, concatenate an `<h4 />`/`<div />` pairing of the key name and its value,
// and append it to the `result` string created at the start.
}
return result; // once the looping is done, `result` will be one long string to put in the email body
}
// sanitize content from the user - trust no one
// ref: https://developers.google.com/apps-script/reference/html/html-output#appendUntrusted(String)
function sanitizeInput(rawInput) {
var placeholder = HtmlService.createHtmlOutput(" ");
placeholder.appendUntrusted(rawInput);
return placeholder.getContent();
}
function doPost(e) {
try {
Logger.log(e); // the Google Script version of console.log see: Class Logger
record_data(e);
// shorter name for form data
var mailData = e.parameters;
// names and order of form elements (if set)
var orderParameter = e.parameters.formDataNameOrder;
var dataOrder;
if (orderParameter) {
dataOrder = JSON.parse(orderParameter);
}
// determine recepient of the email
// if you have your email uncommented above, it uses that `TO_ADDRESS`
// otherwise, it defaults to the email provided by the form's data attribute
var sendEmailTo = (typeof TO_ADDRESS !== "undefined") ? TO_ADDRESS : mailData.formGoogleSendEmail;
// send email if to address is set
if (sendEmailTo) {
MailApp.sendEmail({
to: String(sendEmailTo),
subject: "Contact form submitted",
// replyTo: String(mailData.email), // This is optional and reliant on your form actually collecting a field named `email`
htmlBody: formatMailBody(mailData, dataOrder)
});
}
return ContentService // return json success results
.createTextOutput(
JSON.stringify({"result":"success",
"data": JSON.stringify(e.parameters) }))
.setMimeType(ContentService.MimeType.JSON);
} catch(error) { // if error return this
Logger.log(error);
return ContentService
.createTextOutput(JSON.stringify({"result":"error", "error": error}))
.setMimeType(ContentService.MimeType.JSON);
}
}
/**
* record_data inserts the data received from the html form submission
* e is the data received from the POST
*/
function record_data(e) {
var lock = LockService.getDocumentLock();
lock.waitLock(30000); // hold off up to 30 sec to avoid concurrent writing
try {
Logger.log(JSON.stringify(e)); // log the POST data in case we need to debug it
// select the 'responses' sheet by default
var doc = SpreadsheetApp.getActiveSpreadsheet();
var sheetName = e.parameters.formGoogleSheetName || "responses";
var sheet = doc.getSheetByName(sheetName);
var oldHeader = sheet.getRange(1, 1, 1, sheet.getLastColumn()).getValues()[0];
var newHeader = oldHeader.slice();
var fieldsFromForm = getDataColumns(e.parameters);
var row = [new Date()]; // first element in the row should always be a timestamp
// loop through the header columns
for (var i = 1; i < oldHeader.length; i++) { // start at 1 to avoid Timestamp column
var field = oldHeader[i];
var output = getFieldFromData(field, e.parameters);
row.push(output);
// mark as stored by removing from form fields
var formIndex = fieldsFromForm.indexOf(field);
if (formIndex > -1) {
fieldsFromForm.splice(formIndex, 1);
}
}
// set any new fields in our form
for (var i = 0; i < fieldsFromForm.length; i++) {
var field = fieldsFromForm[i];
var output = getFieldFromData(field, e.parameters);
row.push(output);
newHeader.push(field);
}
// more efficient to set values as [][] array than individually
var nextRow = sheet.getLastRow() + 1; // get next row
sheet.getRange(nextRow, 1, 1, row.length).setValues([row]);
// update header row with any new data
if (newHeader.length > oldHeader.length) {
sheet.getRange(1, 1, 1, newHeader.length).setValues([newHeader]);
}
}
catch(error) {
Logger.log(error);
}
finally {
lock.releaseLock();
return;
}
}
function getDataColumns(data) {
return Object.keys(data).filter(function(column) {
return !(column === 'formDataNameOrder' || column === 'formGoogleSheetName' || column === 'formGoogleSendEmail' || column === 'honeypot');
});
}
function getFieldFromData(field, data) {
var values = data[field] || '';
var output = values.join ? values.join(', ') : values;
return output;
}
Contact Form HTML
<section id="contact-form">
<form id="gform"
class="contact-form" method="post"
action="(Google Scripts URL)"
enctype="text/plain">
<p>
<label for="name">Your Name <font face="Arial" color="red">*</font></label>
<input type="text" style="height:35px;" class="heighttext required" name="name" id="name" class="required" title="* Please provide your name">
</p>
<p>
<label>Your Location <font face="Arial" color="red">*</font></label>
<select name="Location" id="column_select" style="height:35px;" class="required" title=" * Please provide your location">
<option selected value="col00">-- State --</option>
<option value="Alabama">Alabama</option>
<option value="California">California</option>
<option value="Florida">Florida</option>
</select>
<select name="City" id="layout_select" style="height:35px;">
<option disabled selected value="Florida">-- City --</option>
<option name="Alachua" value="Florida_Alachua">Alachua</option>
<option name="Alford" value="Florida_Alford">Alford</option>
</select>
</p>
<p>
<input type="submit" value="Send Message" id="submit" class="pp-btn special">
<img src="images/ajax-loader.gif" id="contact-loader" alt="Loading...">
<input type="hidden" name="action" value="send_message">
</p>
</form>
</section><!-- #contact-form -->
Form Handler Javascript
(function() {
function validEmail(email) { // see:
var re = /^([\w-]+(?:\.[\w-]+)*)#((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;
return re.test(email);
}
function validateHuman(honeypot) {
if (honeypot) { //if hidden form filled up
console.log("Robot Detected!");
return true;
} else {
console.log("Welcome Human!");
}
}
// get all data in form and return object
function getFormData() {
var form = document.getElementById("gform");
var elements = form.elements;
var fields = Object.keys(elements).filter(function(k) {
return (elements[k].name !== "honeypot");
}).map(function(k) {
if(elements[k].name !== undefined) {
return elements[k].name;
// special case for Edge's html collection
}else if(elements[k].length > 0){
return elements[k].item(0).name;
}
}).filter(function(item, pos, self) {
return self.indexOf(item) == pos && item;
});
var formData = {};
fields.forEach(function(name){
var element = elements[name];
// singular form elements just have one value
formData[name] = element.value;
// when our element has multiple items, get their values
if (element.length) {
var data = [];
for (var i = 0; i < element.length; i++) {
var item = element.item(i);
if (item.checked || item.selected) {
data.push(item.value);
}
}
formData[name] = data.join(', ');
}
});
// add form-specific values into the data
formData.formDataNameOrder = JSON.stringify(fields);
formData.formGoogleSheetName = form.dataset.sheet || "responses"; // default sheet name
formData.formGoogleSendEmail = form.dataset.email || ""; // no email by default
console.log(formData);
return formData;
}
function handleFormSubmit(event) { // handles form submit without any jquery
event.preventDefault(); // we are submitting via xhr below
var data = getFormData(); // get the values submitted in the form
/* OPTION: Remove this comment to enable SPAM prevention, see README.md
if (validateHuman(data.honeypot)) { //if form is filled, form will not be submitted
return false;
}
*/
if( data.email && !validEmail(data.email) ) { // if email is not valid show error
var invalidEmail = document.getElementById("email-invalid");
if (invalidEmail) {
invalidEmail.style.display = "block";
return false;
}
} else {
disableAllButtons(event.target);
var url = event.target.action; //
var xhr = new XMLHttpRequest();
xhr.open('POST', url);
// xhr.withCredentials = true;
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xhr.onreadystatechange = function() {
console.log( xhr.status, xhr.statusText )
console.log(xhr.responseText);
//document.getElementById("gform").style.display = "none"; // hide form
/*
var thankYouMessage = document.getElementById("thankyou_message");
if (thankYouMessage) {
thankYouMessage.style.display = "block";
}
*/
return;
};
// url encode form data for sending as post data
var encoded = Object.keys(data).map(function(k) {
return encodeURIComponent(k) + "=" + encodeURIComponent(data[k])
}).join('&')
xhr.send(encoded);
}
}
function loaded() {
console.log("Contact form submission handler loaded successfully.");
// bind to the submit event of our form
var form = document.getElementById("gform");
form.addEventListener("submit", handleFormSubmit, false);
};
document.addEventListener("DOMContentLoaded", loaded, false);
function disableAllButtons(form) {
var buttons = form.querySelectorAll("button");
for (var i = 0; i < buttons.length; i++) {
buttons[i].disabled = true;
}
}
})();
finally, this is the extra code that would break if I simply tried changing the value of option to, e.g., 'Alachua' instead of 'Flordia_Alachua'. https://jsfiddle.net/hmatt843/504dgmqy/19/
Thanks for any and all help.

Try console.log(key) before if( key === 'Action'). I think you'll find that key never equals 'Action', exactly. Looks like you'll need if( key === 'action'), instead.
If you wish to remove part of string value, try the replace method: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replace
It also looks like you're trying to work with elements[k].name when you mean to be working with elements[k].value.
I believe your code should look something like...
function(k) {
if(elements[k].value !== undefined) {
return elements[k].value.replace('Florida_', '');
// special case for Edge's html collection
} else if(elements[k].length > 0){
return elements[k].item(0).value.replace('Florida_', '');
}
}
... or something to that effect.
In the future, you may want to make it easier for folks trying to help you by posting only the portions of code your having trouble with, and breaking your questions into different posts. A lot to sift through up there.
Hope this helped.

The split() method splits a String object into an array of strings by separating the string into substrings, using a specified separator string to determine where to make each split.
Var splitValue = elements[k].item(0).value.split("");
splitValue[1] will give you a string of characters after the delimeter () in this case.

javascript save state of check boxes

I am having an issue where the current state of the checkbox is not being saved. I am new to this and any help would be appreciated. Here's the jQuery code that is partially working.
var userCityList = [];
$("#checkboxes").unbind('change').bind('change', function (event) {
var stateVal = $(':selected', $('#ResidentialLocationStateList')).val();
var cityID = $(event.target)[0].id;//stores city id
var cityVal = $(event.target)[0].value;//stores city value
if ($('#' + cityID).is(':checked')) {
if (userCityList.length < 5) {
userCityList.push(cityID);
}
else {
$('#' + cityID).prop('checked', false);
alert("5 cities have been selected");
return;
}
}//end if
if (!($("#" + cityID).is(':checked'))) {
userCityList.pop();
}
//console.log(userCityList);
});
LOGIC
When the user selects a state, a set of cities in checkboxes appear. When a user clicks a checkbox, that particular city is stored in the userCityList array. When the user clicks it again, it deletes it from the array. However, if the user changes the state, those cities are no longer checked, which does not allow one to delete it from the array, if needed.
Any suggestions?
HTML code
<div class="panel-body">
<p>Select upto 5 state/city combinations</p>
<div class="col-xs-3 no-pad-left less-width">
#*<p>Select upto 5 state/city combinations</p>*#
<select id="ResidentialLocationStateList" name="ResidentialLocationStateList" multiple></select>
</div>
<div class="col-xs-3" id="checkboxes">
</div>
</div>
UPDATE Here's the image that goes with this issue.
So when a few cities are selected and the user decides to change the state from the select element, those cities that were selected prior need to be saved.
UPDATE
Here's the AJAX code...
$("#ResidentialLocationStateList").change(function () {
url = "/ResidentialBuilding/getCityList?state=";
state = $("#ResidentialLocationStateList").val();
url = url + state;
//console.log(url);
$("#checkboxes").empty();
$.getJSON(url, function (data) {
//console.log(data);
$.each(data, function (index, value) {
//console.log(value.city);
id = value.city;
id = id.replace(/\s+/g, '');
valCity = value.city;
valCity = valCity.replace(/\s+/g, '');
$("#checkboxes").append('<input value="' + valCity + '"' + 'type=' + "'checkbox'" + 'id=' + id + '>' + value.city + '</input><br>');
});
});
});

If you're using a modern version of jQuery I would recommend using .off and .on and to use .off if you really have to.
lso the .pop() array method removes the last element but the element just clicked may not always be the one that was added last. And since, the check boxes are added dynamically, the following bind could be made at the very beginning of DOM ready and not necessarily in any event handler. Rather than give your checkboxes the same ID which leads to invalid HTML, use a class selector, .checkboxes.
Therefore, I would suggest the following code
var userCityList = [];
$(document).on("change", ".checkboxes", function() {
var stateVal = $('#ResidentialLocationStateList').val();
var cityID = this.id;//stores city id
var cityVal = this.value;//stores city value
var finalDiv = $('#final');
var tempDiv = $('#othertempdiv');
if( this.checked ) {
if( userCityList.length < 5 ) {
userCityList.push( cityID );
finalDiv.append( this );
} else {
$(this).prop('checked', false);
alert('5 cities have been selected');
}
} else {
var index = $.inArray( cityID, userCityList );
if( index > -1 ) {
userCityList.splice( index, 1 );
tempDiv.append( this );
}
}
});
Since you're -- per comments below -- replacing the selected cities each time you select a new state, you would have to have a second div which would hold all the selected cities. Un-checking any of the cities in this final div would move it back; if another state is selected, such a city would be lost.
<div id="final"></div>

Use a multidimensional array to store both state and city IDs, like userCityList [ stateVal ]:
var userCityList = [];
$("#checkboxes").unbind('change').bind('change', function (event) {
var stateVal = $(':selected', $('#ResidentialLocationStateList')).val();
var cityID = $(event.target)[0].id;//stores city id
var cityVal = $(event.target)[0].value;//stores city value
if ($('#' + cityID).is(':checked')) {
if (userCityList.length < 5) {
if(!userCityList[stateVal])userCityList[stateVal] = [];
userCityList[stateVal].push(cityID);
}
else {
$('#' + cityID).prop('checked', false);
alert("5 cities have been selected");
return;
}
}//end if
if (!($("#" + cityID).is(':checked'))) {
if(userCityList[stateVal]){
//Edited, now it can remove the city by its position (index)
var position = $.inArray(cityID, userCityList[stateVal]);
userCityList[stateVal].slice(position, 1);
}
}
});
So when you need to retrieve the checked cities for an state you can do just:
for(var i =0; i < userCityList[stateVal].length; i++){
console.log(userCityList[stateVal][i]);
}
UPDATE
The hard work is done. Now, in your ajax code, when you load a new set of checkboxes, you have to check if the checkbox was previously checked:
$("#ResidentialLocationStateList").change(function () {
url = "/ResidentialBuilding/getCityList?state=";
state = $("#ResidentialLocationStateList").val();
url = url + state;
//console.log(url);
$("#checkboxes").empty();
$.getJSON(url, function (data) {
//console.log(data);
$.each(data, function (index, value) {
//console.log(value.city);
id = value.city;
id = id.replace(/\s+/g, '');
valCity = value.city;
valCity = valCity.replace(/\s+/g, '');
$("#checkboxes").append('<input value="' + valCity + '"' + 'type=' + "'checkbox'" + 'id=' + id + '>' + value.city + '</input><br>');
//Let's check if this checkbox was previously checked
if($.inArray(id, userCityList[state])){
//if yes, let's check it again
$('#'+id).prop('checked', true);
}
});
});
});
Keep in mind that the userCityList variable must be global to store these values and you will loose your checkboxes memories if you refresh the page, of course.

change textbox value in client side and read it in server side

I have some textbox and I change the value of this textboxes in clientside (javascript) ,value was changed but when I read in server side after postback actually value not changed. my textbox isn't read only or disable.
notice that I use updatepanel and my postbacks is async.any idea to solve this issue?
update
I use this jquery to support placeholder in ie,but it cause value of my textboxes equal to placeholder value, and this conflict when my postback is async. for solving this problem I use below jquery code:
function EndRequestPostBackForUpdateControls() {
//*****************************For place holder support in ie******************************
if (runPlaceHolder != 0) {
//alert('end');
$('input, textarea').placeholder();
var $inputs = $('.placeholder');
$inputs.each(function () {
var $replacement;
var input = this;
var $input = $(input);
var id = this.id;
if (input.value == '') {
if (input.type == 'password') {
if (!$input.data('placeholder-textinput')) {
try {
$replacement = $input.clone().attr({ 'type': 'text' });
} catch (e) {
$replacement = $('<input>').attr($.extend(args(this), { 'type': 'text' }));
}
$replacement
.removeAttr('name')
.data({
'placeholder-password': $input,
'placeholder-id': id
})
.bind('focus.placeholder', clearPlaceholder);
$input
.data({
'placeholder-textinput': $replacement,
'placeholder-id': id
})
.before($replacement);
}
$input = $input.removeAttr('id').hide().prev().attr('id', id).show();
// Note: `$input[0] != input` now!
}
$input.addClass('placeholder');
$input[0].value = $input.attr('placeholder');
} else {
$input.removeClass('placeholder');
}
});
}}
function safeActiveElement() {
// Avoid IE9 `document.activeElement` of death
// https://github.com/mathiasbynens/jquery-placeholder/pull/99
try {
return document.activeElement;
} catch (err) { }}
function BeginRequestPostBackForUpdateControls() {
//*****************************For place holder support in ie******************************
if (runPlaceHolder != 0) {
// Clear the placeholder values so they don't get submitted
var $inputs = $('.placeholder').each(function () {
var input = this;
var $input = $(input);
if (input.value == $input.attr('placeholder') && $input.hasClass('placeholder')) {
if ($input.data('placeholder-password')) {
$input = $input.hide().next().show().attr('id', $input.removeAttr('id').data('placeholder-id'));
// If `clearPlaceholder` was called from `$.valHooks.input.set`
if (event === true) {
return $input[0].value = value;
}
$input.focus();
} else {
alert($(this)[0].value);
$(this)[0].value = '';
alert($(this)[0].value);
$input.removeClass('placeholder');
input == safeActiveElement() && input.select();
}
}
});
}}
$(document).ready(function () {
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_beginRequest(BeginRequestPostBackForUpdateControls);
prm.add_endRequest(EndRequestPostBackForUpdateControls);
});
I use this code to clear my textbox value before sending to server in add_beginRequest,and set value in add_endRequest (for placeholder in ie).
can anyone help solve this problem? thank you.

You changed the value of TextBox with javascript and the respective ViewState is not updated. You can use hidden field to store the value in javascript and get it in code behind.
Html
<input type="hidden" id="hdn" runat="server" />
JavaScript
document.getElementById("hdn").value = "your value";
Code behind
string hdnValue = hdn.Value;

Use hidden field to store the value, and retrieve it on the server side.

How to serialize multiple checkbox values by jQuery?

I modified the simple example of jQuery.post as
$("#searchForm").submit(function(event) {
event.preventDefault();
var $form = $( this ),
term = $( "input[name^=tick]:checked" ).serialize(),
url = $form.attr( 'action' );
$.post( url, { ticks: term, id: '55' },
function( data ) {
$( "#result" ).empty().append( data );
}
);
});
This works for single checkbox with val() but not for multiple checkboxes in
<input type="checkbox" name="tick" value="'.$value.'" />
since serialize() should generateticks: termto be used astermin$.post`.
How can I make the serialize() to generate appropriate data for $.post
NOTE: I do not want to serialize the entire form but only checked values of checkbox INPUT.

Simple value collector :)
HTML
<input type="checkbox" class="selector" value="{value}"/>
JS
var checked='';
$('.selector:checked').each(function(){
checked=checked+','+$(this).val();
});
PHP
$ids=explode(',',substr($_GET['param_with_checked_values'],1));

You could use .serializeArray()
Ref: http://api.jquery.com/serializeArray/

In html code change name="tick" in name="tick[]" and you can use simply $(this).serialize(); to post all checked values.

You can still use .serializeArray and use it in .post() like this:
var postData = {};
var form = $('#formId').serializeArray();
for (var i = 0; i < form.length; i++) {
if (form[i]['name'].endsWith('[]')) {
var name = form[i]['name'];
name = name.substring(0, name.length - 2);
if (!(name in postData)) {
postData[name] = [];
}
postData[name].push(form[i]['value']);
} else {
postData[form[i]['name']] = form[i]['value'];
}
}
$.post('/endpoint', postData, function(response) {
}, 'json');
postData will contain all form elements except the disabled ones. All checkbox values will be passed as an array just like when doing a normal form submission.

let $form = $(".js-my-form");
let $disabled = $form.find(':input:disabled').removeAttr('disabled');
let formData = {};
$.each($form.serializeArray(), function (index, fieldData) {
if (fieldData.name.endsWith('[]')) {
let name = fieldData.name.substring(0, fieldData.name.length - 2);
if (!(name in formData)) {
formData[name] = [];
}
formData[name].push(fieldData.value);
} else {
formData[fieldData.name] = fieldData.value;
}
});
$disabled.attr('disabled', 'disabled');
console.log(formData);
Its a variation of Stanimir Stoyanov answer with possibility to serialize disabled fields.

term = $("#input[name^=tick]:checked").map(function () {
return this.value;
}).get();
term.join();