链接颜色顺序

a.hl1:link
... {
    color:Black;
}
a.hl1:visited
... {
 color:Yellow;
}
a.hl1:hover
... {
 color:Green;
}
a.hl1:active
... {
    color:Red;
}

<asp:HyperLink id="hl" CssClass="hl1" runat="server" NavigateUrl="~/Default4.aspx">HyperLink</asp:HyperLink>