ASP.NET linkbutton avoid click twice in iOS

ASP.NET linkbutton avoid click twice in iOS

HTML

<div id="menutech">
    <div id="Toolbar_TechToolbar1_pnlIncidents" class="dropdown-menu">      

        Incidents / SR
        <ul>
            <li id="Toolbar_TechToolbar1_pnlNewIncidentsList" class="toplistitem ">
                <a id="Toolbar_TechToolbar1_lnkNewIncidentsList" href="javascript:__doPostBack(&#39;ctl00$Toolbar$TechToolbar1$lnkNewIncidentsList&#39;,&#39;&#39;)">

                <span>Nouveaux</span>
                </a>
            </li>
            <li id="Toolbar_TechToolbar1_pnlOpenIncidentsList" class=" ">
                <a id="Toolbar_TechToolbar1_lnkOpenIncidentsList" href="javascript:__doPostBack(&#39;ctl00$Toolbar$TechToolbar1$lnkOpenIncidentsList&#39;,&#39;&#39;)">

                <span>Ouverts</span>
                </a>
            </li>           
            <li id="Toolbar_TechToolbar1_pnlMyIncidentsList" class=" ">
                <a id="Toolbar_TechToolbar1_lnkMyIncidentsList" class="default" href="javascript:__doPostBack(&#39;ctl00$Toolbar$TechToolbar1$lnkMyIncidentsList&#39;,&#39;&#39;)">

                <span>Mes incidents / SR</span>
                </a>
            </li>
            <li id="Toolbar_TechToolbar1_pnlCreateIncident" class=" bottomlistitem">
                <a id="Toolbar_TechToolbar1_lnkNewIncident" href="javascript:__doPostBack(&#39;ctl00$Toolbar$TechToolbar1$lnkNewIncident&#39;,&#39;&#39;)">

                <span>Créer un incident / SR</span>
                </a>
            </li>
        </ul>
    </div>
</div>

CSS

/*
COLORS:
Green : #7BA400
Light Green : #E2EBC7
Title text highlight: #7CA501
Dark Blue : #004C85
Light Bleu : #71BADC
Very Light Bleu : #E0F0F7
Error panel background:#E9B7B7
Tooltip Yellow: #FFFFE1
Dark Gray: #3D3D3D
*/

/* STYLE RESET */
body, table, td, tr, h1, h2, h3, h4, div, span, li, ul, ol, input
{
    padding:0px;
    margin:0px;
    border-collapse:collapse;
}

/* BODY GENERAL */

body
{
    font-family:Trebuchet MS;    
    font-size:85%; /* Default size (16px) for Trebuchet MS is too big */
}

.body-margin
{
    /* SI ON VEUT DES MARGES À DROITE ET À GAUCHE */

    margin-top:0px;
    margin-bottom:0px;
    margin-right:30px;
    margin-left:30px;
    background-color:#004C85;
}

.body-content
{
    padding:5px;
    padding-top:2px;
    color:#004C85;
    background-color:#FFFFFF;
    min-height:100%;
}

a:link, a:active, a:hover, a:visited  {
    color:#004d86;
}

a img {
    border:0;
}

/* HEADER */

#header
{
    padding-top:5px;
}

#header .header-content 
{
    width:100%;
}
#header .left 
{
     text-align:left; 
}
#header .center 
{ 
    text-align:center;
}

#header .right 
{ 
    vertical-align:top;
    text-align:right;
    padding-right:3px;
}

/* Team Announcements Header */

.teamannouncement
{
    margin-top:8px;
    margin-left:50px;
    margin-right:50px;
    display:none;
}

.teamannouncement-table
{
    padding:1px;
    background-color:#FFFFE1;
    width:100%;
}

.teamannouncement-table td
{
    border:solid 2px #004C85;
    border-collapse:collapse;
    padding-left:3px;
    padding-right:3px;
    padding-top:5px;
}

.teamannouncement-teamname
{
    font-weight:bold;
}

.teamannouncement-message
{
}

.teamannouncement-message p
{
    margin:0px;
    padding:0px;
}

/* MENU BAR */
.menubar
{
    padding-top:4px;
    padding-bottom:4px;
    padding-right:2px;
    padding-left:2px;
    background-color: #71BADC;
    font-weight:bold;
    margin-top:8px;
    margin-bottom:8px;
    min-height:20px;
    text-transform:uppercase;
   ...

JavaScript

require(['jquery'], function ($) {

        $().ready(function () {
            $("#menutech div.dropdown-menu").mouseover(openDropDown);
            $("#menutech div.dropdown-menu").mouseout(closeDropDown);
        });

        function openDropDown() {
            $(this).addClass("open");
            $(this).children("ul").addClass("open");
        }

        function closeDropDown() {
            $(this).removeClass("open");
            $(this).children("ul").removeClass("open");
        }

    });