function overdaohang(opt)
	{
	   

	  if(opt=='1')
	   {
    
	  document.getElementById("daohang").src='../images/daohang1.jpg';
        return;
	  }
	  if(opt=='2')
	   {
	   
	  document.getElementById("daohang").src='../images/daohang2.jpg';
         return;   
	  }
	  if(opt=='3')
	   {
	
	  document.getElementById("daohang").src='../images/daohang3.jpg';
	  return;
	  }
	 if(opt=='4')
	   {

	  document.getElementById("daohang").src='../images/daohang4.jpg';
	  return;
	  }
	  if(opt=='5')
	   {

	  document.getElementById("daohang").src='../images/daohang5.jpg';
	  return;
	  }
	 if(opt=='6')
	   {

	  document.getElementById("daohang").src='../images/daohang6.jpg';
	  return;
	  }
	   if(opt=='7')
	   {

	  document.getElementById("daohang").src='../images/daohang7.jpg';
	  return;
	  }
	      if(opt=='8')
	   {

	  document.getElementById("daohang").src='../images/daohang8.jpg';
	  return;
	  }
	   if(opt=='9')
	   {

	  document.getElementById("daohang").src='../images/daohang9.jpg';
	  return;
	  }
	}
    function outdaohang()
	{

	  document.getElementById("daohang").src='../images/daohang4.jpg';
	
	
	}