function thisMovie(movieName) {
   if (navigator.appName.indexOf("Microsoft") != -1) {
      return window[movieName]
   }else {
      return document[movieName]
   }
}

<!--初期位置-->
function Center(){
thisMovie('YFMap').smoothMoveTo('37.27.24.456,137.47.18.762');
thisMovie('YFMap').layerTo('10')
}

<!--東-->
function East(){
thisMovie('YFMap').smoothMoveTo('37.27.24.456,138.47.18.762');
thisMovie('YFMap').layerTo('10')
}

<!--西-->
function West(){
thisMovie('YFMap').smoothMoveTo('34.41.38.369,133.47.16.454');	
thisMovie('YFMap').layerTo('10')
}