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Posted 3 Oct 2007


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JavaScript for Submitting/Closing modal popup on Enter/Esc keypress

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3 Oct 2007CPOL
JavaScript for submitting/closing modal popup on Enter/Esc keypress.


Here is a solution for how to submit / close an AjaxModalPopup box on Enter/Esc keypress. AjaxModalPopup is used frequently in a lot of web pages. Here is a solution which will make your web application feel like a Windows application. You can submit AjaxModalPopup on Enter key and close AjaxModalpopup on Esc key press.


This article extends AJAX Control Toolkit 's ModalPopupExtender control.

Using the Code

Following is the JavaScript for extending the AJAX Control Toolkit 's ModalPopupExtender functionality.

<script language="javascript" type="text/javascript">
    function body_onkeydown() 
        if(event.keyCode==13 || event.keyCode==27) 
            var _defaultButtonName=getDefautButtonName( event.keyCode==13 ? 
                        "submitButton" : "cancelButton");
            var frm=document.forms[0];
            if(frm && document.all(_defaultButtonName))
    function getDefautButtonName(className) 
        var _defaultButtonName="";
        var children = document.getElementsByTagName("input");
        for (var i = 0; i < children.length; i++) 
            var child = children[i];
            var btnAction = child.buttonAction;
            if(btnAction == className)
                _defaultButtonName =;
        return _defaultButtonName;

<body onkeydown="body_onkeydown()">
    <form id="form1" runat="server">
        <asp:Panel ID="pnlmain" runat="server">
                    <td colspan="2">
                        Name : <asp:TextBox ID="txtUserNmae" 
                    <td colspan="2">
                        Pwd : <asp:TextBox ID="txtPwd" 
                        <asp:Button ID="btnSubmit" runat="server" 
                                 Text="Ok" buttonAction="submitButton"/>
                        <asp:Button ID="btnCancel" runat="server" 
                                 Text="Cancel" buttonAction="cancelButton"/>
        <asp:Button ID="btnPopup" runat="server" Text="Popup" />
        <cc1:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
        <cc1:ModalPopupExtender ID="ModalPopupExtender1" 
             runat="server" CancelControlID="btnCancel" 
             OkControlID="btnSubmit" PopupControlID="pnlmain" 

In the OK, Cancel buttons of the modal popup control, a custom property is added called buttonAction where we set the OK button's buttonAction="submitButton" and the Cancel button's buttonAction="cancelButton".


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Nital Soni
India India
No Biography provided

Comments and Discussions

Questionhow to prevent popup closing when press enter? Pin
raj4028-Jan-15 5:10
Memberraj4028-Jan-15 5:10 
GeneralThere is a small bug in this example which is succesfully fixed! Pin
MamukaHachidze28-Dec-08 7:01
MemberMamukaHachidze28-Dec-08 7:01 
GeneralBrilliant! Pin
Jcmorin12-Nov-07 3:10
MemberJcmorin12-Nov-07 3:10 
This is exactly what I was looking for. I think this code should be added to library.

The extender should and can do this build-in because we already specify the
OkControlID=OkButton CancelControlID=CancelButton

Anyway... it work. Gonna try with multiple modal windows.

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