diff --git a/doc/UTIL_API.md b/doc/UTIL_API.md
index 2dc50a2..7c3ae70 100644
--- a/doc/UTIL_API.md
+++ b/doc/UTIL_API.md
@@ -847,6 +847,25 @@ delegate.add(container, 'click', '.children', clickHandler);
 delegate.remove(container, 'click', '.children', clickHandler);
 ```
 
+## detectBrowser 
+
+Detect browser info using ua.
+
+|Name                    |Type  |Desc                              |
+|------------------------|------|----------------------------------|
+|[ua=navigator.userAgent]|string|Browser userAgent                 |
+|return                  |object|Object containing name and version|
+
+Browsers supported: ie, chrome, edge, firefox, opera, safari, ios(mobile safari), android(android browser)
+
+```javascript
+var browser = detectBrowser();
+if (browser.name === 'ie' && browser.version < 9)
+{
+    // Do something about old IE...
+}
+```
+
 ## each 
 
 Iterates over elements of collection and invokes iteratee for each element.
@@ -1267,6 +1286,12 @@ Checks if value is classified as a Number primitive or object.
 |value |*      |Value to check                       |
 |return|boolean|True if value is correctly classified|
 
+```javascript
+isNum(5); // -> true
+isNum(5.1); // -> true
+isNum({}); // -> false
+```
+
 ## isObj 
 
 Check if value is the language type of Object.
diff --git a/src/index.es6 b/src/index.es6
index afcea2d..73faf89 100644
--- a/src/index.es6
+++ b/src/index.es6
@@ -86,7 +86,7 @@ module.exports = {
         });
 
         // http://stackoverflow.com/questions/3885018/active-pseudo-class-doesnt-work-in-mobile-safari
-        el.setAttribute('ontouchstart', '');
+        if (util.detectBrowser().name === 'ios') el.setAttribute('ontouchstart', '');
 
         this._$el = util.$(el);
     },
diff --git a/src/lib/util.js b/src/lib/util.js
index 2e96f42..5a81d79 100644
--- a/src/lib/util.js
+++ b/src/lib/util.js
@@ -566,6 +566,24 @@ module.exports = (function ()
         return exports;
     })();
 
+    /* ------------------------------ isBrowser ------------------------------ */
+
+    var isBrowser = _.isBrowser = (function (exports)
+    {
+        /* Check if running in a browser.
+         *
+         * ```javascript
+         * console.log(isBrowser); // -> true if running in a browser
+         * ```
+         */
+
+        exports = typeof window === 'object' &&
+                  typeof document === 'object' &&
+                  document.nodeType === 9;
+
+        return exports;
+    })({});
+
     /* ------------------------------ optimizeCb ------------------------------ */
 
     var optimizeCb = _.optimizeCb = (function ()
@@ -1091,6 +1109,12 @@ module.exports = (function ()
          * |------|-------|-------------------------------------|
          * |value |*      |Value to check                       |
          * |return|boolean|True if value is correctly classified|
+         * 
+         * ```javascript
+         * isNum(5); // -> true
+         * isNum(5.1); // -> true
+         * isNum({}); // -> false
+         * ```
          */
 
         /* dependencies
@@ -1609,24 +1633,6 @@ module.exports = (function ()
         return exports;
     })();
 
-    /* ------------------------------ isBrowser ------------------------------ */
-
-    var isBrowser = _.isBrowser = (function (exports)
-    {
-        /* Check if running in a browser.
-         *
-         * ```javascript
-         * console.log(isBrowser); // -> true if running in a browser
-         * ```
-         */
-
-        exports = typeof window === 'object' &&
-                  typeof document === 'object' &&
-                  document.nodeType === 9;
-
-        return exports;
-    })({});
-
     /* ------------------------------ isCrossOrig ------------------------------ */
 
     _.isCrossOrig = (function ()
@@ -4382,6 +4388,128 @@ module.exports = (function ()
         return exports;
     })();
 
+    /* ------------------------------ toInt ------------------------------ */
+
+    var toInt = _.toInt = (function ()
+    {
+        /* Convert value to an integer.
+         *
+         * |Name  |Type  |Desc             |
+         * |------|------|-----------------|
+         * |val   |*     |Value to convert |
+         * |return|number|Converted integer|
+         *
+         * ```javascript
+         * toInt(1.1); // -> 1
+         * toInt(undefined); // -> 0
+         * ```
+         */
+
+        /* dependencies
+         * toNum 
+         */
+
+        function exports(val)
+        {
+            if (!val) return val === 0 ? val : 0;
+
+            val = toNum(val);
+
+            return val - val % 1;
+        }
+
+        return exports;
+    })();
+
+    /* ------------------------------ detectBrowser ------------------------------ */
+
+    _.detectBrowser = (function ()
+    {
+        /* Detect browser info using ua.
+         *
+         * |Name                    |Type  |Desc                              |
+         * |------------------------|------|----------------------------------|
+         * |[ua=navigator.userAgent]|string|Browser userAgent                 |
+         * |return                  |object|Object containing name and version|
+         * 
+         * Browsers supported: ie, chrome, edge, firefox, opera, safari, ios(mobile safari), android(android browser)
+         *
+         * ```javascript
+         * var browser = detectBrowser();
+         * if (browser.name === 'ie' && browser.version < 9) 
+         * {
+         *     // Do something about old IE...
+         * }
+         * ```
+         */
+
+        /* dependencies
+         * isBrowser toInt keys 
+         */
+
+        function exports(ua) 
+        {
+            ua = ua || (isBrowser ? navigator.userAgent : '');
+            ua = ua.toLowerCase();
+
+            var ieVer = getVer(ua, 'msie ');
+
+            if (ieVer) return {
+                version: ieVer,
+                name: 'ie'
+            };
+
+            if (regIe11.test(ua)) return {
+                version: 11,
+                name: 'ie'
+            };
+
+            for (var i = 0, len = browsers.length; i < len; i++) 
+            {
+                var name = browsers[i],
+                    match = ua.match(regBrowsers[name]);
+
+                if (match == null) continue;
+
+                var version = toInt(match[1].split('.')[0]);
+
+                if (name === 'opera') version = getVer(ua, 'version/') || version;
+
+                return {
+                    name: name,
+                    version: version
+                };
+            }
+
+            return {
+                name: 'unknown',
+                version: -1
+            };
+        }
+
+        var regBrowsers = {
+            'edge': /edge\/([0-9._]+)/,
+            'firefox': /firefox\/([0-9.]+)(?:\s|$)/,
+            'opera': /opera\/([0-9.]+)(?:\s|$)/,
+            'android': /android\s([0-9.]+)/,
+            'ios': /version\/([0-9._]+).*mobile.*safari.*/,
+            'safari': /version\/([0-9._]+).*safari/,
+            'chrome': /(?!chrom.*opr)chrom(?:e|ium)\/([0-9.]+)(:?\s|$)/
+        };
+
+        var regIe11 = /trident\/7\./,
+            browsers = keys(regBrowsers);
+
+        function getVer(ua, mark) 
+        {
+            var idx = ua.indexOf(mark);
+
+            if (idx > -1) return toInt(ua.substring(idx + mark.length, ua.indexOf('.', idx)));
+        }
+
+        return exports;
+    })();
+
     /* ------------------------------ rtrim ------------------------------ */
 
     var rtrim = _.rtrim = (function ()
@@ -5039,39 +5167,6 @@ module.exports = (function ()
         return exports;
     })();
 
-    /* ------------------------------ toInt ------------------------------ */
-
-    _.toInt = (function ()
-    {
-        /* Convert value to an integer.
-         *
-         * |Name  |Type  |Desc             |
-         * |------|------|-----------------|
-         * |val   |*     |Value to convert |
-         * |return|number|Converted integer|
-         *
-         * ```javascript
-         * toInt(1.1); // -> 1
-         * toInt(undefined); // -> 0
-         * ```
-         */
-
-        /* dependencies
-         * toNum 
-         */
-
-        function exports(val)
-        {
-            if (!val) return val === 0 ? val : 0;
-
-            val = toNum(val);
-
-            return val - val % 1;
-        }
-
-        return exports;
-    })();
-
     /* ------------------------------ uniqId ------------------------------ */
 
     _.uniqId = (function ()