If you don't want a post back you can do this (note I have to do remote scripting because users cried about the page refresh):
Dim Button2 As New System.Web.UI.HtmlControls.HtmlButton
Button2.InnerHtml = ":: Get Record from DB ::"
Button2.Attributes.Add("style", "background : #ffffff;border : 1;border-style : solid;font : Arial, Helvetica, sans-serif;")
Button2.Attributes.Add("type", "btn")
Button2.Attributes.Add("onclick", "CheckBrowserType(document.getElementById('CE_Editor1_ID_Frame'));")
Editor1.AddToolbarSeparator()
Editor1.AddToolbarGroupStart()
Editor1.AddToolControl("GetDB", Button2)
Editor1.AddToolbarGroupEnd()