A tooltip is a little pop-up window that seems when a user pauses the mouse pointer over a part, like over a Button. In this tutorial, I will show you how to disable the Tooltip in ASP.NET 4.5.2. Take a glance at the code below:

JavaScript
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script type="text/javascript">
        function DisableToolTip() {
            // Get the object
            var obj = document.getElementById('LnkBtn');
            // set the tool tip as empty
            obj.title = "";
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <asp:LinkButton runat="server" Text="Simple Link Button" ToolTip="Simple Button with Tool Tip" ID="LnkBtn" ClientIDMode="Static" ></asp:LinkButton>
   <a href="#" id="lnkDisable" onclick="DisableToolTip();">Disable Tool Tip</a>
    </form>
</body>
</html>

JQuery

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">    
<title></title>
    <script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>
    <script type="text/javascript">
        $(document).ready(function () {
            $("#lnkDisable").click(function () { $('#LnkBtn').attr({'title':''}); });
        });
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <asp:LinkButton runat="server" Text="Simple Link Button" ToolTip="Simple Button with Tool Tip" ID="LnkBtn" ClientIDMode="Static" ></asp:LinkButton>
    <a href="#" id="lnkDisable">Disable Tool Tip</a>
    </form>
</body>
</html>