gistfile1.js

  var Validator = (function (){
		var rules = [];
		return {
			_add: function (rule) {
				if (rules[rule.objectName] === undefined) {
					rules[rule.objectName] = [];
				}
				rules[rule.objectName].push(rule);
			},
			configurate: function (rules) {
				for (var i = 0, len = rules.length; i < len; i++) {
					this._add(rules[i]);
				}
			},
			check: function (field, value) {
				if (rules[field] === undefined) return;
				if (rules[field].length === 0) return;
				var valid = true, messages = [];
				for (var i = 0; i < rules[field].length; i++) {
					if (rules[field][i].type === 'lengthLessThan') {
						if (value.length > rules[field][i].value) {
							valid = false;
							messages.push('Error, ' + value.length + ' great than ' + rules[field][i].value);
							continue;
						}
					}
					if (rules[field][i].type === 'greatThan') {
						if (value <= rules[field][i].value) {
							valid = false;
							messages.push('Error, ' + value + ' less or equal ' + rules[field][i].value);
							continue;
						}
					}
					if (rules[field][i].type === 'notEmpty') {
						if ((String(value).length < 1)||(!/\S/.test(value))) {
							valid = false;
							messages.push('Error, ' + value + ' is empty!');
							continue;
						}
					}
					if (rules[field][i].type === 'validDate') {
						if (String(value) === 'Invalid Date') {
							valid = false;
							messages.push('Error, ' + value + ' is not a date!');
							continue;
						}
					}
					if (rules[field][i].type === 'isNumber') {
						if (isNaN(+value)) {
							valid = false;
							messages.push('Error, ' + value + ' is not valid number!');
							continue;
						}
					}
					if (rules[field][i].type === "valueFromSet") {
						if (rules[field][i].value.indexOf(value) === -1) {
							valid = false;
							messages.push('Error, ' + value + ' is not from set');
							continue;
						}
					}
				};
				return {valid:valid, messages:messages, field:field};
			}
			
		}
	})();