diff --git a/lib/chrome.js b/lib/chrome.js
index bf40da3..9cfaa8f 100644
--- a/lib/chrome.js
+++ b/lib/chrome.js
@@ -53,10 +53,22 @@ var ChromeObject = function() {
     this.isPreventEvaluate = false;
 
     this.create = function() {
-        this.oAutoIt = AutoItX.create().getInterface();
+        try {
+            this.oAutoIt = AutoItX.create().getInterface();
+        } catch (e) {
+            console.warn("AutoItX is disabled");
+        }
         return this;
     };
 
+    this.callAutoIt = function(FN, args) {
+        if (this.oAutoIt != null) {
+            this.oAutoIt[FN].apply(args);
+        } else {
+            console.warn("AutoItX is disabled");
+        }
+    };
+
     this.setIsPreventEvaluate = function(flag) {
         this.isPreventEvaluate = flag;
     };
@@ -505,7 +517,7 @@ var ChromeObject = function() {
 
     this.terminate = function() {
         try {
-            this.oAutoIt.WinKill(this.getTitle());
+            this.callAutoIt("WinKill", [this.getTitle()]);
         } catch (e) {
             console.error("ChromeObject.terminate() ->", e.message);
         }
@@ -521,13 +533,13 @@ var ChromeObject = function() {
                     this.setPageId(null);
                 }
 
-				// calling _focus()
+                // calling _focus()
                 title = this._focus();
 
                 // find window by title
                 var pageList = this.getPageList();
                 if (pageList.length > 0) {
-                    this.oAutoIt.WinActivate(title);
+                    this.callAutoIt("WinActivate", [title]);
                 }
             } catch (e) {
                 console.error("ChromeObject._focus() ->", e.message);
@@ -602,7 +614,7 @@ var ChromeObject = function() {
         var y = this.getRandomInt(0, bY);
         var w = this.getRandomInt(bX * 3, sX - bX);
         var h = this.getRandomInt(bY, sY - bY);
-        this.oAutoIt.WinMove(title, "", x, y, w, h);
+        this.callAutoIt("WinMove", [title, "", x, y, w, h]);
 
         // blur
         this.blur();
@@ -618,7 +630,7 @@ var ChromeObject = function() {
         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);
+        this.callAutoIt("WinMove", [title, "", x, y, w, h]);
 
         // blur
         this.blur();
@@ -628,8 +640,8 @@ var ChromeObject = function() {
         if (this.debuggingPort > 0) {
             try {
                 var pos = this.getScreenPosition();
-                this.oAutoIt.MouseMove(pos.x + 100, pos.y + 100);
-                this.oAutoIt.MouseWheel("down", times);
+                this.callAutoIt("MouseMove" [pos.x + 100, pos.y + 100]);
+                this.callAutoIt("MouseWheel", ["down", times]);
             } catch (e) {
                 console.error("ChromeObject.downMouseWheel() ->", e.message);
             }
@@ -640,8 +652,8 @@ var ChromeObject = function() {
         if (this.debuggingPort > 0) {
             try {
                 var pos = this.getScreenPosition();
-                this.oAutoIt.MouseMove(pos.x + 100, pos.y + 100);
-                this.oAutoIt.MouseWheel("up", times);
+                this.callAutoIt("MouseMove", [pos.x + 100, pos.y + 100]);
+                this.callAutoIt("MouseWheel", ["up", times]);
             } catch (e) {
                 console.error("ChromeObject.upMouseWheel() ->", e.message);
             }
@@ -1068,7 +1080,7 @@ var ChromeObject = function() {
     };
 
     this.sendSpaceKey = function() {
-        this.oAutoIt.Send("{SPACE}");
+        this.callAutoIt("Send", ["{SPACE}"]);
     };
 
     this.setValue = function(selector, value, repeat, searchIndex) {
@@ -1133,7 +1145,11 @@ var ChromeObject = function() {
     this.__escape = function(value) {
         return 'decodeURIComponent("' + encodeURIComponent(value) + '")';
     };
-    
+
+    this.prompt = function(s) {
+        return this.getEvaluatedValue('prompt("' + s + '")');
+    };
+
     this.setVendor = function(vendor) {
         var vendor = vendor.toLowerCase();