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JAVASCRIPT

Working with Pop Ups and Browser Windows in JavaScript
By: Jagadish Chaterjee
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    2006-04-25

    Table of Contents:
  • Working with Pop Ups and Browser Windows in JavaScript
  • How to write to a pop up window dynamically using JavaScript
  • How to access the data available in a pop up window from within the main window using JavaScript
  • How to access the data available in the main window from within a pop up window and vice versa using JavaScript
  • How to access the data available in main window from within a popup window and vice-versa using JavaScript: discussion

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    Working with Pop Ups and Browser Windows in JavaScript - How to access the data available in a pop up window from within the main window using JavaScript


    (Page 3 of 5 )

    Now, let us try to develop a simple script (JavaScript) which writes user specified information to a pop up window dynamically.  We shall even access the information available in pop up window from within the main window!  Have a look at the following code:

    <html>
          <head>
                <meta  name=vs_targetSchema
     content="http://schemas.microsoft.com/intellisense/ie5">
    <script  id="clientEventHandlersJS"  language="javascript">
    <!--
    // global variable for subwindow reference
    var w;
    function openNewWindow( ) {
          if (!w || w.closed) {
            w = window.open("","NewWindow","status,height=200,width=300");
            // delay writing until window exists in IE/Windows
            setTimeout("openNewWindow( )", 50);
        } else if (w.focus) {
            // window is already open and focusable, so bring it to the front
            w.focus( );
        }
        // assemble content for new window
        var c = document.all.txtHTML.value;
        // write HTML to new window document
        w.document.write(c);
        w.document.close( ); // close layout stream
    }

    function Button1_onclick() {
          openNewWindow();
    }

    function Button2_onclick() {
          alert(w.document.getElementById("txtName").value );
    }

    //-->
                </script>
          </head>
          <body>
                <form  id="form1">
                      Enter HTML:<textarea  id="txtHTML"
     NAME="txtHTML"><html><head><title>My sub  Window</title></head><body>Enter Name: <form id="Form1"><input
    id="txtName" type=text></form></body></html></textarea><br>
                      <input  type="button"  value="Show"  id="Button1"
     
    name="Button1"  onclick="return Button1_onclick()">
                      <input  type="button"  value="Get"  id="Button2"
     name="Button2"  onclick="return Button2_onclick()">
                </form>
          </body>
    </html>

    This is another interesting concept pertaining to the use of pop up windows.  We will certainly know about retrieving information available on the current web page.  But, how about accessing the information available in a pop up window from within the main window?  This section does the same.

    The following is the function I used to achieve this:

    functionButton2_onclick() {
          alert(w.document.getElementById("txtName").value );
    }

    I am expecting that the pop up window contains a text box named "txtName" and I am trying to access the information available in it.  To access the information in a pop up window from within the main window, we need to work with the "document" object of the pop up window.  Once you get the "document" object, the rest of the routines will be very similar to the ordinary way we implement in main windows.

    More JavaScript Articles
    More By Jagadish Chaterjee


       · The example scripts are only supported by Internet Explorer since he uses...
       · Hai, get in touch with popups and browser windows using basic JavaScripts.
     

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