diff --git a/lib/chrome.js b/lib/chrome.js
index 4d28ac3..4f674f0 100644
--- a/lib/chrome.js
+++ b/lib/chrome.js
@@ -362,13 +362,15 @@ var ChromeObject = function() {
 
     this.terminate = function() {
         try {
-            this.oAutoIt.WinKill(this.title);
+            this.oAutoIt.WinKill(this.getTitle());
         } catch (e) {
             console.error("ChromeObject.terminate() ->", e.message);
         }
     };
 
     this.focus = function() {
+        var title = "";
+
         if (this.debuggingPort > 0) {
             try {
                 // set page id
@@ -379,25 +381,28 @@ var ChromeObject = function() {
                 // get current title
                 this.title = this.getTitle();
 
-				// new title
-				var _title = this.title + " " + this.pageId.substring(0, 6);
+                // will be change title
+                title = this.title + " " + this.pageId.substring(0, 6);
 
                 // change webpage title for focusing window
-                this.setTitle(_title);
+                this.setTitle(title);
 
                 // find window by title
                 var pageList = this.getPageList();
                 if (pageList.length > 0) {
-                    this.oAutoIt.WinActivate(_title);
+                    this.oAutoIt.WinActivate(title);
                 }
             } catch (e) {
                 console.error("ChromeObject._focus() ->", e.message);
             }
         }
+
+        return title;
     };
 
+
     this.blur = function() {
-        this.setTitle(this.title);
+        return this.setTitle(this.title);
     };
 
     this.getScrollHeight = function(selector) {
@@ -423,24 +428,38 @@ var ChromeObject = function() {
         }
     };
 
-    this.autoAdjust = function(sX, sY) {
-        // get current title
-        var _title = this.getTitle();
-
-        // change webpage title
-        this.setTitle(this.pageId);
+    this.autoAdjustByScreen = function(sX, sY, divX, divY) {
+        // catch focus
+        var title = this.focus();
+        sleep(300);
 
         // adjust window position and size
-        var bX = Math.floor(sX / 6);
-        var bY = Math.floor(sY / 3);
+        var bX = Math.floor(sX / divX);
+        var bY = Math.floor(sY / divY);
         var x = this.getRandomInt(0, bX);
         var y = this.getRandomInt(0, bY);
         var w = this.getRandomInt(bX * 3, sX - bX);
         var h = this.getRandomInt(bY, sY - bY);
-        this.oAutoIt.WinMove(this.pageId, "", x, y, w, h);
+        this.oAutoIt.WinMove(title, "", x, y, w, h);
 
-        // change webpage title to original
-        this.setTitle(_title);
+        // release focus
+        this.blur();
+    };
+
+    this.autoAdjustByWindow = function(sX, sY, w1, w2, h1, h2) {
+        // catch focus
+        var title = this.focus();
+        sleep(300);
+
+        // adjust window position and size
+        var w = this.getRandomInt(w1, w2);
+        var h = this.getRandomInt(h1, h2);
+        var x = this.getRandomInt(0, (sX - w < 0 ? parseInt(sX * 0.2) : (sX - w)));
+        var y = this.getRandomInt(0, (sY - h < 0 ? parseInt(sY * 0.2) : (sY - h)));
+        this.oAutoIt.WinMove(title, "", x, y, w, h);
+
+        // release focus
+        this.blur();
     };
 
     this.blur = function() {