GetPostBackEventReference and Validation Issue

Hi Folks


I encouter some postback issue when using GetPostBackEventReference. Here is the Scenario:
I have a javascript modal popup dialog and got a button in this modal dialog which used to select things (this is NOT an asp:button control)

When this javascript dialog HTML button is clicked, it will call the MS AJAX web service call by the javascript: eval() method. And this MS AJAX web service call is dynamically generated. So the code is like this:


var serviceCall = svcCall + "(" + parameters + ")";   //dynamically generate the MS AJAX web service call here
eval(serviceCall);                                                 ...