$(document).ready(function(){
    $(document).ajaxError(errorHandler.callback);
});

var errorHandler = {
    
    callback: function (event, xhr, ajaxOptions, thrownError) {
        /**$.unblockUI();*/
	    try{
	        var json = eval('(' + xhr.responseText + ')');
	        console.error(json);
	    }
	    catch(exception){
            console.error(xhr.responseText);
	    }
    }
}