[js css] Click on the hidden layer, click on another layer to hide the original layer_javascript skills

Use a global variable to save the last opened object

<div id="myc"> <div class="changemeun"> <div class="a1"> <a onclick="changemenu('menu_1');"> </a>College Information</div> <div class="a2"> <a onclick="changemenu('menu_2');"></a>Advanced Sexuality Education</div> <div class="a3"> <a onclick="changemenu('menu_3');"></a>Admissions Information</div> <div class="a4"> <a onclick="changemenu('menu_4');"></a>Latest Lecture</div> <div class="a5"> <a onclick="changemenu('menu_5');"></a>School Activities</div> </div> <div id="menu_1" style="DISPLAY: none" class="list_a1"> </div>1 Currency conversion, the picture below shows that this program simply places the elements in the directory below. The interface required for this example of the currency conversion application includes some UI component instances (Button, ComboB Currency Conversion, the image below shows an example of this program component (Button, ComboB Currency Conversion, the image below shows this program simply puts the elements in the directory below, in the interface required for this example of the Coin Conversion application, Contains some examples of UI components (Button, ComboBox, Label, TextArea, and TextInput). In this application, the user must enter a Canadian dollar amount and simply place the element in the following directory, in the currency conversion. The example component instance of the application (Button, ComboB Currency Conversion, the figure below shows that this program simply places the elements in the following directory, and the interface required for the example of the currency conversion application, including some UI components Example (Button, ComboBox, Label, TextArea, and TextInput). In this application, the user must enter a Canadian dollar number (Button, ComboBox, Label, TextArea, and TextInput). the amount of one Canadian dollar, <div id="menu_2" style="DISPLAY: none" class="list_a2"> </div>2 Currency conversion, the picture below shows that this program simply places the elements in the directory below. The interface required for this example of the currency conversion application includes some UI component instances (Button, ComboB Currency Conversion, the image below shows an example of this program component (Button, ComboB Currency Conversion, the image below shows this program simply puts the elements in the directory below, in the interface required for this example of the Coin Conversion application, Contains some examples of UI components (Button, ComboBox, Label, TextArea, and TextInput). In this application, the user must enter a Canadian dollar amount and simply place the element in the following directory, in the currency conversion. The example component instance of the application (Button, ComboB Currency Conversion, the figure below shows that this program simply places the elements in the following directory, and the interface required for the example of the currency conversion application, including some UI components Example (Button, ComboBox, Label, TextArea, and TextInput). In this application, the user must enter a Canadian dollar number (Button, ComboBox, Label, TextArea, and TextInput). the amount of one Canadian dollar, <div id="menu_3" style="DISPLAY: none" class="list_a3"> </div>3 Currency conversion, the picture below shows that this program simply places the elements in the directory below. The interface required for this example of the currency conversion application includes some UI component instances (Button, ComboB Currency Conversion, the image below shows an example of this program component (Button, ComboB Currency Conversion, the image below shows this program simply puts the elements in the directory below, in the interface required for this example of the Coin Conversion application, Contains some examples of UI components (Button, ComboBox, Label, TextArea, and TextInput). In this application, the user must enter a Canadian dollar amount and simply place the element in the following directory, in the currency conversion. The example component instance of the application (Button, ComboB Currency Conversion, the figure below shows that this program simply places the elements in the following directory, and the interface required for the example of the currency conversion application, including some UI components Example (Button, ComboBox, Label, TextArea, and TextInput). In this application, the user must enter a Canadian dollar number (Button, ComboBox, Label, TextArea, and TextInput). the amount of one Canadian dollar, <script> var old=null; function changemenu(mydiv){ var obj = document.getElementById(mydiv); if (old!=null&&old!=obj) old.style.display='none'; old=obj; if (obj.style.display=='none'){ obj.style.display='block'; }else{ obj.style.display='none'; } } </script><div id="menu_4" style="DISPLAY: none" class="list_a4">4 Currency conversion, the picture below shows that this program simply places the elements in the following directory. The interface required for this example of the currency conversion application includes some UI component instances (Button, ComboB Currency Conversion, the image below shows an example of this program component (Button, ComboB Currency Conversion, the image below shows this program simply puts the elements in the directory below, in the interface required for this example of the Coin Conversion application, Contains some examples of UI components (Button, ComboBox, Label, TextArea, and TextInput). In this application, the user must enter a Canadian dollar amount and simply place the element in the following directory, in the currency conversion. The example component instance of the application (Button, ComboB Currency Conversion, the figure below shows that this program simply places the elements in the following directory, and the interface required for the example of the currency conversion application, including some UI components Example (Button, ComboBox, Label, TextArea, and TextInput). In this application, the user must enter a Canadian dollar number (Button, ComboBox, Label, TextArea, and TextInput). the amount of one Canadian dollar, </div> <div id="menu_5" style="DISPLAY: none" class="list_a5">5 Currency conversion, the picture below shows that this program simply places the elements in the following directory. The interface required for this example of the currency conversion application includes some UI component instances (Button, ComboB Currency Conversion, the image below shows an example of this program component (Button, ComboB Currency Conversion, the image below shows this program simply puts the elements in the directory below, in the interface required for this example of the Coin Conversion application, Contains some examples of UI components (Button, ComboBox, Label, TextArea, and TextInput). In this application, the user must enter a Canadian dollar amount and simply place the element in the following directory, in the currency conversion. The example component instance of the application (Button, ComboB Currency Conversion, the figure below shows that this program simply places the elements in the following directory, and the interface required for the example of the currency conversion application, including some UI components Example (Button, ComboBox, Label, TextArea, and TextInput). In this application, the user must enter a Canadian dollar number (Button, ComboBox, Label, TextArea, and TextInput). the amount of one Canadian dollar, </div> </div>
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