var popupOptions = {
    fillSymbol: new esri.symbol.SimpleFillSymbol(esri.symbol.SimpleFillSymbol.STYLE_SOLID,
                new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID,
                new dojo.Color([255, 0, 0]), 2),
                new dojo.Color([255, 255, 0, 0.25]))
}

var popup = new esri.dijit.Popup(popupOptions, dojo.create("div"));

map = new esri.Map("map", {
    infoWindow:popup,
    extent: initExtent
});

function makeMoveable(node){
    var dnd = new dojo.dnd.Moveable(dojo.byId(node));
}
makeMoveable(popup);