SendMessage

// includes
dekiapi();
jquery.ui('smoothness');

// input form
var recipients = (site.users);
<form>
    "What: "; <textarea id="msgwhat" type="text" />
    <br />
    <br />
    <div id="whospan">
    " Who: ";
    <select id="msgwho">
        foreach(var uname in recipients) {
            var u = uname.name;
            <option value=(u) selected=((uname.id == user.id) ? 'selected' : nil)>u</option>
        }
    </select>" ";
    <input id="msgsend" type="button" value="Send" ctor="
        when($this.click) {
            @msgsend({ entry: { what: #msgwhat.val(), who: #msgwho.val()}});
            #msgwhat.val('');
            #msgsend.blur();
        }
        when(@msgsend) {
            Deki.Api.PostMessage(null, 'activity/poke', 
                '@'+ @msgsend.entry.who+': '+ @msgsend.entry.what );
        }
    " />
    </div>
</form>


<style type="text/css">"
#msgwhat {    
    width: 85%;
    height: 3em;
    float: right;
    margin-right: 20px;
}

#whospan {
    margin-top: 5px;
}

#msgwho {
    margin-left: 7px;
}

"</style>