using System.Web;
using System.Text;
using System.Web.UI;

/// <summary>
/// A JavaScript alert
/// </summary>
public static class Alert
{

    /// <summary>
    /// Shows a client-side JavaScript alert in the browser.
    /// </summary>
    /// <param name="message">The message to appear in the alert.</param>
    public static void Show(string message)
    {
        // Cleans the message to allow single quotation marks
        string cleanMessage = message.Replace("'", "\\'");
        string script = "<script type=\"text/javascript\">alert('" + cleanMessage + "');</script>";

        // Gets the executing web page
        Page page = HttpContext.Current.CurrentHandler as Page;

        // Checks if the handler is a Page and that the script isn't allready on the Page
        if (page != null && !page.ClientScript.IsClientScriptBlockRegistered("alert"))
        {
            page.ClientScript.RegisterClientScriptBlock(typeof(Alert), "alert", script);
        }
    }
}
