$.extend({
    "put" : function (url, data, success, error) {
        error = error || function() {}; 
        return $.ajax({
            "url" : url,
            "data" : data,
            "success" : success,
            "type" : "PUT",
            "cache" : false,
            "error" : error,
            "dataType" : "json"
        });
    },
    "del" : function (url, data, success, error) { 
        error = error || function() {};
        return $.ajax({
            "url" : url,
            "data" : data,
            "success" : success,
            "type" : "DELETE",
            "cache" : false,
            "error" : error,
            "dataType" : "json"
        });
    }
});