My problem is that i want to get the error on the same place.
<td>
<asp:TextBox> ...</asp:TextBox>
<br />
<asp:RegularExpressionValidator
ErrorMessage=""please enter 9 digis only" ...>
</asp:RegularExpressionValidator>
<asp:RequiredFieldValidator
ErrorMessage="this can't be blank" ...>
</asp:RequiredFieldValidator>
</td>
i attached an image with the output, look and the red messages this is the validators.
i want that the error messages will be at the same place since just one error can be on.
thanks for helpers (and for who tries).

Add
Display=Dynamicproperty to both the validators.Further Reference