Double postback + Mozilla

[mike55]

I am using the ajax control toolkit update panel for a site. I have noted that when users use my site with the Mozilla browser and click on one of the buttons in the update panel that a double postback occurs. I have been unable to trace the source of this problem and I have been unable to replicate it in IE 6.0. Has anyone come across this problem before?

I have found the source of my problems, it is caused by the following vb.net/javascript code that I am using:

 Prevent the user from double clicking on the save button.
    Private Sub PreventDoubleClick()
        Dim sb As System.Text.StringBuilder = New System.Text.StringBuilder()
        sb.Append("if (typeof(Page_ClientValidate) == function) { ")
        sb.Append("if (Page_ClientValidate() == false) { return false; }} ")
        sb.Append("this.value = Please wait...;")
        sb.Append("this.disabled = true;")
        sb.Append(Page.GetPostBackEventReference(btnSave))
        sb.Append(";")
        btnSave.Attributes.Add("onclick", sb.ToString())
    End Sub

I am using the above code to prevent the user from being able to double click a button. The button itself is sitting in a ajax update panel. Interesting problem.

Mike55.