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jquery ajax load

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In this video we will discuss how to load HTML data from the server using jquery AJAX load function.

What is AJAX
AJAX stands for Asynchronous JavaScript and XML, and allow parts of the page to be updated without having to reload the entire page. 

load( url [, data ] [, complete ] )

Parameter Description
url Required. URL to which the request is sent
data Optional. A JSON object or string that is sent to the server along with the request
complete A callback function that is called when the request completes

The following example loads HTML data from the server. When a text box receives focus, the help text associated with that field is loaded from the server and displayed. When the focus is lost the help text disappears.

jquery ajax load

    <script src="jquery-1.11.2.js"></script>
    <script type="text/javascript">
        $(document).ready(function () {
            var textBoxes = $('input[type="text"]');
            textBoxes.focus(function () {
                var helpDiv = $(this).attr('id') + 'HelpDiv';
                $('#' + helpDiv).load('Help.html #' + helpDiv);

            textBoxes.blur(function () {
                var helpDiv = $(this).attr('id') + 'HelpDiv';
                $('#' + helpDiv).html('');
<body style="font-family:Arial">
            <td>First Name</td>
            <td><input id="firstName" type="text" /></td>
            <td><div id="firstNameHelpDiv"></div></td>
            <td>Last Name</td>
            <td><input id="lastName" type="text" /></td>
            <td><div id="lastNameHelpDiv"></div></td>
            <td><input id="email" type="text" /></td>
            <td><div id="emailHelpDiv"></div></td>
            <td><input id="income" type="text" /></td>
            <td><div id="incomeHelpDiv"></div></td>

<div id="firstNameHelpDiv">
    Your fisrt name as it appears in passport

<div id="lastNameHelpDiv">
    Your last name as it appears in passport

<div id="emailHelpDiv">
    Your email address for communication

<div id="incomeHelpDiv">
    Your annual income

jQuery tutorial for beginners


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