Problem adding an attribute to button

[jay123]

Hello,
I have a page, divided into 3 section. Left Menu, Middle and Right Menu.

Left Menu data comes from control, Middle Menu data is sorted on a page and Right Menu links also depends upon page to page so they are set on a page itself as

Dim button As LinkButton = New LinkButton()
        button.Text = "imarket agency list"
        AddHandler button.Click, AddressOf abc
        button.Attributes.Add("class", "rightmenu")
        button.Attributes.Add("causesvalidation", "false")
        RightMenu.Controls.Add(button)

As seen above, i am trying to create a linkbutton and trying to add it to RightMenu. My problem is how can i get this button to ignore validation. i.e. Whenever i click on this linkbutton(which comes on right menu), validation fires if something is not valid on that page. I thought adding attribute of 'causesvalidation' as 'false' would work as 'class' but it doesn't.

Am i missing something here or is their any another way to implement this.

Regards
Jay

[jay123]

button.CausesValidation = False