SharePoint 2010 modal dialog (showModalDialog) without an existing page

I was retrieving Activity data from a Microsoft CRM 2011 REST query. I wanted to have a popup with more information. I decided to use the built in showModalDialog. The problem was that all the examples I found showed how to popup an existing page. I wanted the modal to contain data that didn’t exist anywhere. The solution was to use the following code, specifically create a divElement and set the innerHTML to html that contained the data I want to show. I threw in some typical SharePoint css classes to keep the same look and feel as the rest of the site.

    displayActivityModalDialog = function () {
        var divElem = document.createElement('div');
        var htmlOutput = '<div class="ms-bodyareacell"><table>'
        htmlOutput += '<tr><td width="190" class="ms-formlabel">Type:</td><td class="ms-formbody">' + this.ActivityType + '</td></tr>';
        htmlOutput += '<tr><td width="190" class="ms-formlabel">Subject:</td><td class="ms-formbody">' + this.Subject + '</td></tr>';
        htmlOutput += '<tr><td width="190" class="ms-formlabel">Date:</td><td class="ms-formbody">' + this.ScheduledStart + '</td></tr>';
        htmlOutput += '<tr><td width="190" class="ms-formlabel">Regarding:</td><td class="ms-formbody">' + this.Regarding + '</td></tr>';
        htmlOutput += '<tr><td width="190" class="ms-formlabel">Organizer:</td><td class="ms-formbody">' + this.Organizer + '</td></tr>';
        htmlOutput += '<tr><td width="190" class="ms-formlabel">Description:</td><td class="ms-formbody">' + this.Description + '</td></tr>';
        htmlOutput += '<tr><td width="190" class="ms-formlabel">Other Attendees:</td><td class="ms-formbody">' + this.RequiredAttendee + '</td></tr>';
        htmlOutput += '</table></div>'

        divElem.innerHTML = htmlOutput;
        var options = SP.UI.$create_DialogOptions();
        options.html = divElem;
        options.title = "Activity details";
        options.showClose = true;
        options.showMaximized = false;
        SP.UI.ModalDialog.showModalDialog(options);
    }

Now I can put anything in a showModalDialog!