How to change html img src on mouse hover

Here I have created sample that will help you out.

HTML

<div>
    <style type="text/css">
        .igte_rPayNet_ButtonImg
        {
            height: 200px;
            width: 300px;
            border: 1px solid;
            border-radius: 8px;
        }
    </style>
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
    <script type="text/javascript">
        $(function () {
            var totalImages = $('[id*=hfImages]').val().split(';').length;
            $('.igte_rPayNet_ButtonImg').attr('src', $('[id*=hfImages]').val().split(';')[0]);
            var i = 1;
            $('.igte_rPayNet_ButtonImg').mouseover(function () {
                if (i >= totalImages) {
                    i = 1;
                }
                $('.igte_rPayNet_ButtonImg').attr('src', $('[id*=hfImages]').val().split(';')[i]);
                i++;
                return false;
            });
        });
    </script>
    <div id="footer">
        <img alt="" class="igte_rPayNet_ButtonImg" />
        <input type="hidden" id="hfImages" runat="server" />
    </div>
</div>

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        string[] filePaths = Directory.GetFiles(Server.MapPath("~/Images/"));
        List<string> files = new List<string>();
        foreach (string filePath in filePaths)
        {
            string fileName = Path.GetFileName(filePath);
            files.Add("Images/" + fileName);
        }
        hfImages.Value = string.Join(";", files);
    }
}

VB

Protected Sub Page_Load(sender As Object, e As EventArgs)
	If Not Me.IsPostBack Then
		Dim filePaths As String() = Directory.GetFiles(Server.MapPath("~/Images/"))
		Dim files As New List(Of String)()
		For Each filePath As String In filePaths
			Dim fileName As String = Path.GetFileName(filePath)
			files.Add(Convert.ToString("Images/") & fileName)
		Next
		hfImages.Value = String.Join(";", files)
	End If
End Sub

Screenshot