Try console.dir(map) before your setextent. I bet you your map object is null do to a scoping issue
Map object is not null.bject
__LOD: undefined
__container: div#map_container.container
__panning: false
__root: div#map_root.container
__tileInfo: null
__visibleDelta: Object
__visibleRect: Object
__zooming: false
_canZoom: function (){return _bb.apply(_ba,arguments||[]);}
_clickDuration: 300
_clickTimer: null
_connects: Array[11]
_cursor: "default"
_dblClickZoomHandler_connect: Array[4]
_delta: null
_downCoords: null
_downPanHandler_connect: Array[4]
_downZoomHandler_connect: Array[4]
_dragEnd: false
_dragOrigin: null
_fireClickEvent: function (){return _bb.apply(_ba,arguments||[]);}
_fireMouseWheel: function (){return _bb.apply(_ba,arguments||[]);}
_firstLayerId: null
_fixedPan: function (){return _bb.apply(_ba,arguments||[]);}
_gc: Object
_infoWindowCoords: null
_infoWindowIsShowing: false
_internalLayerIds: Array[1]
_isPanningOrZooming: function (){return _bb.apply(_ba,arguments||[]);}
_iwExtentChange_connect: null
_iwPan_connect: null
_iwZoomStart_connect: null
_keyNavigatingHandler_connect: Array[4]
_keyNavigationEndHandler_connect: Array[4]
_keyboardPanDx: 0
_keyboardPanDy: 0
_layerDivs: Array[0]
_layerSize: 1
_layers: Array[0]
_layersDiv: div#map_layers.layersDiv
_mapParams: Object
_mouseWheelEvent: Object
_mouseWheelTimer: null
_navDiv: null
_normalizeRect: function (){return _bb.apply(_ba,arguments||[]);}
_onKeyDown_connect: null
_onKeyUp_connect: null
_onLoadHandler_connect: Array[4]
_onMouseDragHandler_connect: null
_onMouseMoveHandler_connect: Array[4]
_onMouseUpHandler_connect: Array[4]
_panEndHandler: function (){return _bb.apply(_ba,arguments||[]);}
_panHandler_connect: null
_panInitEvent: "onMouseDown"
_panStartHandler_connect: null
_panningHandler: function (){return _bb.apply(_ba,arguments||[]);}
_params: Object
_processEvent: function (){return _bb.apply(_ba,arguments||[]);}
_ratioH: 0.3474365355898457
_ratioW: 0.3474365355898506
_recenterHandler_connect: Array[4]
_recenterZoomHandler_connect: null
_scrollZoomHandler_connect: Array[4]
_slider: null
_sliderChangeAnchor: null
_slider_connect: null
_slidermovestop_connect: null
_upPanHandler_connect: null
_upZoomHandler_connect: null
_zoom: 0
_zoomAnim: null
_zoomAnimDiv: div#_zAD
_zoomEndHandler: function (){return _bb.apply(_ba,arguments||[]);}
_zoomHandler_connect: null
_zoomInitEvent: "onMouseDown"
_zoomRect: Object
_zoomStartHandler: function (){return _bb.apply(_ba,arguments||[]);}
_zoomingHandler: function (){return _bb.apply(_ba,arguments||[]);}
container: div#map.map
cursor: "default"
extent: Object
graphics: Object
graphicsLayerIds: Array[0]
height: 698
id: "map"
infoWindow: Object
isClickRecenter: false
isDoubleClickZoom: false
isKeyboardNavigation: false
isPan: false
isPanArrows: false
isRubberBandZoom: false
isScrollWheelZoom: false
isShiftDoubleClickZoom: false
isZoomSlider: false
layer0_addtoken_err: Array[4]
layer0_addtoken_load: Array[4]
layerIds: Array[1]
loaded: true
onClick: function (){var ap=Array.prototype,c=arguments.callee,ls=c._listeners,t=c.target;var r=t&&t.apply(this,arguments);var lls;lls=[].concat(ls);for(var i in lls){if(!(i in ap)){lls.apply(this,arguments);}}return r;}
onDblClick: function (){var ap=Array.prototype,c=arguments.callee,ls=c._listeners,t=c.target;var r=t&&t.apply(this,arguments);var lls;lls=[].concat(ls);for(var i in lls){if(!(i in ap)){lls.apply(this,arguments);}}return r;}
onExtentChange: function (){var ap=Array.prototype,c=arguments.callee,ls=c._listeners,t=c.target;var r=t&&t.apply(this,arguments);var lls;lls=[].concat(ls);for(var i in lls){if(!(i in ap)){lls.apply(this,arguments);}}return r;}
onKeyDown: function (){var ap=Array.prototype,c=arguments.callee,ls=c._listeners,t=c.target;var r=t&&t.apply(this,arguments);var lls;lls=[].concat(ls);for(var i in lls){if(!(i in ap)){lls.apply(this,arguments);}}return r;}
onKeyUp: function (){var ap=Array.prototype,c=arguments.callee,ls=c._listeners,t=c.target;var r=t&&t.apply(this,arguments);var lls;lls=[].concat(ls);for(var i in lls){if(!(i in ap)){lls.apply(this,arguments);}}return r;}
onLoad: function (){var ap=Array.prototype,c=arguments.callee,ls=c._listeners,t=c.target;var r=t&&t.apply(this,arguments);var lls;lls=[].concat(ls);for(var i in lls){if(!(i in ap)){lls.apply(this,arguments);}}return r;}
onMouseDown: function (){var ap=Array.prototype,c=arguments.callee,ls=c._listeners,t=c.target;var r=t&&t.apply(this,arguments);var lls;lls=[].concat(ls);for(var i in lls){if(!(i in ap)){lls.apply(this,arguments);}}return r;}
onMouseWheel: function (){var ap=Array.prototype,c=arguments.callee,ls=c._listeners,t=c.target;var r=t&&t.apply(this,arguments);var lls;lls=[].concat(ls);for(var i in lls){if(!(i in ap)){lls.apply(this,arguments);}}return r;}
onPan: function (){var ap=Array.prototype,c=arguments.callee,ls=c._listeners,t=c.target;var r=t&&t.apply(this,arguments);var lls;lls=[].concat(ls);for(var i in lls){if(!(i in ap)){lls.apply(this,arguments);}}return r;}
onPanEnd: function (){var ap=Array.prototype,c=arguments.callee,ls=c._listeners,t=c.target;var r=t&&t.apply(this,arguments);var lls;lls=[].concat(ls);for(var i in lls){if(!(i in ap)){lls.apply(this,arguments);}}return r;}
onResize: function (){var ap=Array.prototype,c=arguments.callee,ls=c._listeners,t=c.target;var r=t&&t.apply(this,arguments);var lls;lls=[].concat(ls);for(var i in lls){if(!(i in ap)){lls.apply(this,arguments);}}return r;}
onUnload: function (){var ap=Array.prototype,c=arguments.callee,ls=c._listeners,t=c.target;var r=t&&t.apply(this,arguments);var lls;lls=[].concat(ls);for(var i in lls){if(!(i in ap)){lls.apply(this,arguments);}}return r;}
onZoom: function (){var ap=Array.prototype,c=arguments.callee,ls=c._listeners,t=c.target;var r=t&&t.apply(this,arguments);var lls;lls=[].concat(ls);for(var i in lls){if(!(i in ap)){lls.apply(this,arguments);}}return r;}
onZoomStart: function (){var ap=Array.prototype,c=arguments.callee,ls=c._listeners,t=c.target;var r=t&&t.apply(this,arguments);var lls;lls=[].concat(ls);for(var i in lls){if(!(i in ap)){lls.apply(this,arguments);}}return r;}
position: Object
spatialReference: Object
width: 918
__proto__: Object