Atlassian Confluence: Macro type plugin that will display a popup window when the page is accessed

Pretty basic idea, i want to show a popup window when some one access the page. I have written a sample code.Actually what i want to do is create a Macro-type plugin which has a body so we could add text, links and different elements into it, and it would display them in a popup window.

Here is the code i have been able to display the popup window when page is accessed but when i choose 'PLAIN_TEXT' as 'getBodyType()'. It shows unformatted text, and when i choose 'RICH_TEXT' it shows nothing. please help!

package com.elixir;import com.atlassian.confluence.content.render.xhtml.ConversionContext;import com.atlassian.confluence.content.render.xhtml.XhtmlException;import com.atlassian.confluence.macro.Macro;import com.atlassian.confluence.macro.MacroExecutionException;import com.atlassian.confluence.xhtml.api.MacroDefinition;import com.atlassian.confluence.xhtml.api.MacroDefinitionHandler;import com.atlassian.confluence.xhtml.api.XhtmlContent;import java.util.ArrayList;import java.util.List;import java.util.Map;public class MyMacro implements Macro{    private final XhtmlContent xhtmlUtils;    public MyMacro(XhtmlContent xhtmlUtils)    {        this.xhtmlUtils = xhtmlUtils;    }    @Override    public BodyType getBodyType()    {        return BodyType.RICH_TEXT;    }    @Override    public OutputType getOutputType()    {        return OutputType.BLOCK;    }    @Override    public String execute(Map<String, String> parameters, String bodyContent, ConversionContext conversionContext) throws MacroExecutionException    {        String body = conversionContext.getEntity().getBodyAsString();        final List<MacroDefinition> macros = new ArrayList<MacroDefinition>();        try        {            xhtmlUtils.handleMacroDefinitions(body, conversionContext, new MacroDefinitionHandler()            {                @Override                public void handle(MacroDefinition macroDefinition)                {                    macros.add(macroDefinition);                }            });        }        catch (XhtmlException e)        {            throw new MacroExecutionException(e);        }        StringBuilder builder = new StringBuilder();        if (!macros.isEmpty())        {            for (MacroDefinition defn : macros) {                builder.append("<script>AJS.$(document).ready(function() {var popup2 = AJS.popup({width:400, height:200, id:'my-popup2', closeOnOutsideClick: true});");                builder.append("$('#my-popup2').css({padding:4});$('#my-popup2').html(\"").append(defn.getBody()).append("\");");                builder.append("popup2.show();});</script>");            }        }        else        {            builder.append("Body not defined");        }        return builder.toString();    }}