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open method (document)

Browser support:
Opens a document stream for writing.
If more than two parameters are set for the method, then it works like the method. This page describes that case only if at most two parameters are set for the method. For other cases, please see the page for the method.
If at most two parameters are specified, then the open method opens the output stream for writing. When the document stream is opened, the write and writeln methods can be used to write some content into the document. If the document was opened by the open method, the close method must be used to close the output stream.
Note: while the document is loading, the document stream is opened for writing. In that case, there is no need to open and close the output stream.
After the document has been loaded, the open method (if at most two parameters are specified) clears the current document. In Internet Explorer, the cleared document is placed in the history list before or after the current item depending on the second parameter of the open method.

Syntax: ([MIMEtype [, historyPosition]]);
You can find the related objects in the Supported by objects section below.


Optional. String that specifies a MIME type for the document.
One of the following values:
Deafult. HTML formatted text.
Plain text format.
GIF image format.
JPEG image format.
XBM image format.
Optional, only supported by Internet Explorer. String that specifies the position of the opened (and cleared) document in the history list. If not specified, the opened document will be placed after the current item in the history list.
Only the following value is supported:
Indicates that the opened document will be placed before the current item in the history list.

Return value:

Returns the opened (and cleared) document object (it is always the same as the current document).

Example HTML code 1:

This example illustrates the use of the open, write and close methods to replace the contents of the document:
    <script type="text/javascript">
        function ReplaceContent () {
            document.write ("<b>Bold text</b>");
            document.write ("<i>Italic text</i>");
            document.close ();
    <button onclick="ReplaceContent ();">Replace the contents of the document</button>
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Supported by objects:

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