how do I get the validationsummary text to put in a custom alert ASP.NET

[GrorAdadomi]

for a recent schoolproject I need to make an ASP-website.On the loginform I have a few validators and a validationsummary.The summary itself works, but I would like to get the text from it,so I could put it into my own custom "popup". The popup is just a twitter-bootstrap model wich I tweaked a bit so I can put in a title and some text easily from any code behind file.Can anybody help me? Any c# code behind, or jquery solution is fine to me.