diff --git a/doc.md b/doc.md
index 44b4db5..b253298 100644
--- a/doc.md
+++ b/doc.md
@@ -42,6 +42,11 @@
 
 #####[LEvent](#LEvent)
 
+##[Window](#Window)
+    This is a work in progress.
+
+#####[ShowAlert(support linux as soon as possible)](#ShowAlert)
+
 
 ##<h2 id="Keyboard">Keyboard</h2>
 
@@ -366,3 +371,21 @@ func main() {
   }
 } 
 ```    
+
+##<h2 id="Window">Window</h2> 
+
+###<h3 id="ShowAlert">.ShowAlert(title, msg,defaultButton,cancelButton string)</h3>
+
+    Displays alert with the given attributes. If cancelButton is not given, only the defaultButton is displayed
+
+####Arguments:
+
+    title(string),
+    msg(string),
+    defaultButton(optional string),
+    cancelButton(optional string)
+           
+
+####Return:
+
+   Returns True if the default button was pressed, or False if cancelled.   
diff --git a/zh_doc.md b/zh_doc.md
index 0894d04..a2b3fd7 100644
--- a/zh_doc.md
+++ b/zh_doc.md
@@ -42,6 +42,11 @@
 
 #####[LEvent](#LEvent)
 
+##[Window](#Window)
+    This is a work in progress.
+
+#####[ShowAlert(support linux as soon as possible)](#ShowAlert)
+
 
 ##<h2 id="Keyboard">键盘</h2>
 ###<h3 id="SetKeyboardDelay">.SetKeyboardDelay(ms)</h3>
@@ -379,4 +384,22 @@ func main() {
     Println("you press...", "mouse left button")
   }
 } 
-```
\ No newline at end of file
+```
+
+##<h2 id="Window">Window</h2> 
+
+###<h3 id="ShowAlert">.ShowAlert(title, msg,defaultButton,cancelButton string)</h3>
+
+    Displays alert with the given attributes. If cancelButton is not given, only the defaultButton is displayed
+
+####Arguments:
+
+    title(string),
+    msg(string),
+    defaultButton(optional string),
+    cancelButton(optional string)
+           
+
+####Return:
+
+   Returns True if the default button was pressed, or False if cancelled. 
\ No newline at end of file