body, html, #map { width: 100%; height: 100%; overflow: hidden; 
	margin:0px; padding:0px; font-family:"微软雅黑"; }

#logo
{ position: absolute; left: 50px; top: 50px; 
  z-index: 10;
  margin:0px; padding:0px; }

#choose_layer
{
  position: absolute; left: 80px; top: 140px;
}