diff --git a/lib/util.js b/lib/util.js
index 76fcd76e..ad856671 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -338,7 +338,7 @@
          */
          
         this.isContainStr           = function(pStr1, pStr2) {
-            var i, n, regExp, str,
+            var i, n, str,
                 ret     = Util.isString(pStr1);
             
             if (ret)
@@ -545,7 +545,7 @@
                 isStr   = Util.isString(pStr);
             
             if (isStr)
-                lRet = pStr.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
+                lRet = pStr.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&');
             
             return lRet;
         };
@@ -977,7 +977,7 @@
             minutes         = minutes < 10 ? '0' + minutes : minutes;
             seconds         = seconds < 10 ? '0' + seconds : seconds;
             
-            lRet            = hours + ":" + minutes + ":" + seconds;
+            lRet            = hours + ':' + minutes + ':' + seconds;
             
             return lRet;
         };
@@ -1017,7 +1017,7 @@
                 day     = date.getDate(),
                 month   = date.getMonth() + 1,
                 year    = date.getFullYear(),
-                lRet    = year + "-" + month + "-" + day + " " + Util.getTime();
+                lRet    = year + '-' + month + '-' + day + ' ' + Util.getTime();
             
             return lRet;
         };