How do I run client script after a postback?

ScriptManager.RegisterClientScriptBlock(
  this,
  typeof( MyList ),
  "blah",
  "DraggifyLists();",
  true );

function addRequestHandler()
{
    Sys.WebForms.PageRequestManager.getInstance().add_endRequest(endRequestHandler);
}


function endRequestHandler(sender, args)
{
    // This function will be called after the postback has completed

    // add your JavaScript function call here
}