There's a good reason why the graphics layers are on top of dynamic layers...however if you wish to move a dynamic layer above all graphics layers here's the scoop.The layers are in the map node like this:
<div id="map_layers">
<div id="map_dynamic_layer_1"></div> //the layer id = dynamic_layer_1, the map_ is added by the api
<div id="map_dynamic_layer_2"></div>
<div id="map_dynamic_layer_3"></div>
<svg id="map_gc">
<g id="graphics_layer_1"> //the g id = graphics_layer_1, api adds nothing
GRAPHICS HERE
</g>
<g id="graphics_layer_2"></g>
</svg>
</div>
You'll notice that all layers except graphic layers (this includes dynamic, tiles, wms, custom, etc) are divs, while graphic layers are contained in a single svg element. They are rendered top to bottom. When you reorder non-graphic layers with map.reorderLayer(layer, index) the api moves the layer to the index passed, always leaving the svg element on the bottom (rendered last and therefore on top). When passing a graphic layer through map.reorderLayer(layer, index) the layer is moved within the svg element. So the svg (all graphics) is a layer just like the others.Let's say we want "dynamic_layer_1" on top of the graphic layers:
dojo.byId('map_layers').insertBefore( dojo.byId('map_gc'), dojo.byId('map_dynamic_layer_1') );
Done.Now that we know how it's done, let's discuss why you don't want to do it:1) May cause instability (IE is most vulnerable to this, and let's face it; it's a challenge enough getting the anything to work properly in IE to start with)2) Will cause erratic panning and zooming occasionally3) The user will no longer be able to interact with graphics or features (unless you move the layer down first, and the main reason why things are the way they are)4) You never know what's going to happen if you try to reorder layers using map.reorderLayer(layer, index) should you choose to do some reordering5) I think of several other issues and there is sure to be moreIf you are making a nice "story" map with no user interaction with graphics or features this will work ok, but...