jQuery.noConflict();
 
 jQuery(document).ready(function() 
 {
        Sys.WebForms.PageRequestManager.getInstance().add_endRequest(endRequestHandler);
         Sys.WebForms.PageRequestManager.getInstance().add_beginRequest(add_beginRequest);
       
        

});


  function add_beginRequest(sender, args)
    {
    }
    
    


  function endRequestHandler(sender, args)
    {
            
            if (jQuery("#nece").attr("value") == "1")
            {
                jQuery("#ImagenPrincipal").hide();
                jQuery("#ImagenPrincipal").fadeIn(2000);
            } 
            
    }