How to get POST data from one velocity template to another?

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,
1

I have a Velocity template which has a form.

<!DOCTYPE HTML>
<html>
    <head>
        <title>$generalUtil.htmlEncode($pageTitle)</title>
        <meta name="decorator" content="atl.general" />
        #requireResource("confluence.web.resources:aui-forms")     
        #requireResource("com.example.plugin.comparator-plugin:comparator-plugin-resources")   
        #requireResource("confluence.web.resources:ajs")
    </head>
    <content tag="key">$action.space.key</content>
   
    <body>

     #applyDecorator("root")
        #decoratorParam("helper" $action.helper)
        #decoratorParam("context" "space-administration")
        #decoratorParam("mode"  "view-space-administration")
        #decoratorParam("infopanel-width" "200px")

        #applyDecorator ("root")
            #decoratorParam ("context" "spaceadminpanel")
            #decoratorParam ("selection" "comparator-plugin-action-web-ui")
            #decoratorParam ("title" $action.getText("action.name"))
            #decoratorParam ("selectedTab" "admin")
            #decoratorParam("helper" $action.helper)

            <form id="form" class="aui" method="post" action="result.vm">
                <fieldset>
                    <button type="button" onClick="fetchAllPagesTitlesOnClick()" style="margin: 2vh auto; display: block;">Get All Pages</button>

                    <div style="display: block;"></div>

                    <label for="pageTiles" style="margin: 2vh 2vw;">Select Page Title:</label>
                    <select name="pageTitles" id="pageTitleSel" style="margin: 2vh auto;" onchange="fetchVersionsOfPage()">
                    </select>

                    <button type="button" onClick="fetchPageVersionsOnClick()" style="margin: 2vh auto; display: block;">Get All Versions</button>

                    <label for="pageVersion1" style="margin: 2vh 2vw;">Select Page Version:</label>
                    <select name="pageVersion1" style="margin: 2vh auto;" id="pageVersionSel1" onChange="fetchPageVersionContent(1)">
                    </select>

                    <div style="display: block;"></div>

                    <label for="pageVersion2" style="margin: 2vh 2vw;">Select Page Version:</label>
                    <select name="pageVersion2" style="margin: 2vh auto;" id="pageVersionSel2" onChange="fetchPageVersionContent(2)">
                    </select>

                    <div style="display: block;"></div>

                    <button type="submit" form="form" value="Submit" style="margin: 2vh auto; display: block;">Submit</button>
                </fieldset>
            </form>
        #end
    #end
    </body>
</html>

I would like the values of the select tags to be displayed on another Velocity template, result.vm. How do I do that? Thank you