onmouseover event for dynamic controls

[jay123]

Hi,
I have ListView and in that ListView their are some Imagebuttons
1) Edit
2) Update
3) Cancel

I want to add 'onmouseover' event to all of these buttons for some user.

i am trying this on page_load

If(DummyUser)
EditButton.Attributes.Add("onmouseover", "this.src='../Images/abc.gif'")
End If

but this give me an error as 'System.NullRef erenceException : Object reference not set to an instance of an object', which i think occurs as above buttons are dynamically created depending upon no. of records in listview and i am trying to add an attribute before the controls is actually rendered. I have tried this code in every event as Pre_init to pre_render but doesnt work

I can add onmouseover event directly into ImageButtons HTML code and they work but then i dont want this effect to be seen by every user.Is their anyway around this so that i can achieve this onmouseover effect.

I am using vb.net for developing this.

Any help will be appreciated.

Regards
Jay

[jay123]

Me answering me :)
As Control is dynamic, we cant add onmouseover attributes rather any attributes if the controls isnt visible.

work around would be on Daragrid_ItemBo und, try finding that control and if it exist add an attributes. Ex

Dim EdButton As ImageButton = DirectCast(e.Item.FindControl("Button1"), ImageButton)
            If Not (EdButton Is Nothing) Then
                EdButton.Attributes.Add("onmouseover", "this.src='../Images/test.gif'")
                EdButton.Attributes.Add("onmouseout", "this.src='../Images/test1.gif'")
            End If