Script code for generate Div as Popup in SharePoint custom user control

Below is the code for generate Model pop in share point or .net . I used this code in my custom share point user control

<script type="text/javascript" src="/_layouts/images/MyUserControl/jquery.min.js"></script>
<script type="text/javascript" src="/_layouts/images/MyUserControl/jquery-ui.js"></script>
<link href="/_layouts/images/MyUserControl/jquery-ui.css" rel="stylesheet" type="text/css" />

<script type="text/javascript">
    function ShowPopup() {
        $("#dialog").dialog({
            title: "Associate Deatils",
            width: 800,
            Height: 670,
            buttons: {
                Close: function () {
                    $(this).dialog('close');
                }
            },
            modal: true
        });
    }
</script>

Here is the C# call :

  Page.ClientScript.RegisterStartupScript(this.GetType(), "ShowPopup", "ShowPopup();", true);