//改变底图
function ChangeBgPic(object){  
   var ss=document.getElementById("PinPai"+object);
   if(object==1)
   {ss.style.background="url(images/beima_logo2.gif)";
   }
   else
   {ss.style.background="url(images/delome_logo2.gif)";
	   }
}
//底图复位
function ResetBgPic(object){
   var ss=document.getElementById("PinPai"+object);
   if(object==1)
   {ss.style.background="url(images/beima_logo1.gif)";   
   }
   else
   {ss.style.background="url(images/delome_logo1.gif)";  
	   }
}