Simply remove DIV
from hyperlink and set deletebutton
class to hyperlink
<asp:Button ID="EditButton" runat="server" CommandName="Edit" Text="Edit" />
<asp:HyperLink ID="HyperLinkDeleteRecord" CssClass="deletebutton" runat="server" NavigateUrl='<%#"DeleteArticle.aspx?passarticleid=" + Eval("ArticleID") %>'>Delete</asp:HyperLink>