Jquery is not working on first time click

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Hello team,

I am facing a problem in my jquery. It is not workin on first time click. After that it is working fine.

This is my html page:

HTML

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>Untitled Document</title>
</head>

<script type="text/javascript">
    clickMenu = function (menu) {
        var getEls = document.getElementById(menu).getElementsByTagName("LI");
        var getAgn = getEls;

        for (var i = 0; i < getEls.length; i++) {
            getEls[i].onclick = function () {
                for (var x = 0; x < getAgn.length; x++) {
                    getAgn[x].className = getAgn[x].className.replace("click", "");
                }
                this.className += "click";
            }
        }
    }
</script>
<style>
    #gallery {
        width: 750px;
        height: 360px;
        position: relative;
        border: 1px solid #ddd;
        background: #f8f8f8;
    }

        #gallery ul {
            list-style: none;
            padding: 5px;
            margin: 0;
            width: 195px;
            float: right;
            height: 219px;
            overflow: auto;
        }

            #gallery ul li {
                display: inline;
                width: 50px;
                height: 50px;
                float: left;
                margin: 0 4px 4px 0;
                border: 1px solid #444;
                cursor: pointer;
            }

                #gallery ul li img {
                    display: block;
                    width: 50px;
                    height: 50px;
                }

                #gallery ul li span {
                    display: none;
                    position: absolute;
                    left: 547px;
                    top: 235px;
                    width: 200px;
                    font-family: verdana, arial, sans-serif;
                    color: #06a;
                    font-size: 11px;
                    line-height: 15px;
                    text-align: justify;
                }

                    #gallery ul li span b {
                        color: #444;
                    }

                /* required for IE5.x and IE6 to display the start image size correctly */
                #gallery ul li.click i img.default {
                    margin: 5px auto 0 auto;
                    width: 320px;
                    height: 240px;
                    border: 1px solid #fff;
                }

                #gallery ul li.off {
                    display: none;
                }

                #gallery ul li.click {
                    border-color: #fc0;
                    background: #f8f8f8;
                    cursor: default;
                }

                    #gallery ul li.click i {
                        position: absolute;
                        left: 0;
                        top: 0;
                        width: 545px;
                        height: 355px;
                    }

                        #gallery ul li.click i img {
                            margin: 5px auto 0 auto;
                            width: auto;
                            height: auto;
                            border: 1px solid #fff;
                        }

                    #gallery ul li.click span {
                        display: block;
                    }
</style>

<body>
    <div onclick="clickMenu('gallery')">
        <div id="gallery">
            <ul>
                <li><i>
                    <img src="images/nature1.jpg" title="" alt="" /></i></li>
                <li><i>
                    <img src="images/nature2.jpg" title="" alt="" /></i></li>
                <li><i>
                    <img src="images/nature3.jpg" title="" alt="" /></i></li>
                <li><i>
                    <img src="images/nature4.jpg" title="" alt="" /></i></li>
                <li><i>
                    <img src="images/nature5.jpg" title="" alt="" /></i></li>

                <li class="click"><i>
                    <img class="default" src="images/nature4.jpg" title="" alt="" /></i></li>
            </ul>
        </div>
    </div>


</body>
</html>

Posted 20-Dec-15 19:46pm

Deepak Tiwari (D'pak)

Updated 20-Dec-15 19:48pm

v2

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Raje_ · Answer 1 · 2015-12-21T00:07:00

Add this code to your page inside script block :

With jquery :

JavaScript

$(document).ready(function () {
           clickMenu('gallery');
       });

And I don't see your jquery file reference. Please add reference of your jquery file.
Eg :
from local path :

JavaScript

<script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>

Or from CDN :

JavaScript

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>

If you don't wanna use jqeury then add these codes inside script after clickMenu event :

JavaScript

window.onload = setTimeout(function () { clickMenu('gallery') }, 0);

Good luck.