right now I have a huge Solution in which we use javascript alerts via RegisterStartupScript for all messages and errors.. We were willing to modify all this to making something similar to the modalPopupExtender, or the extender itself in a way that doesn't require too much effort... I mean, to show a modalpopup on a single page I need to create it on the aspx file, setting the attributes etc... So i'm just asking for Ideas, want to know how you guys deal with this..right now I have a huge Solution in which we us