function a(obj)
{
   document.getElementById("m"+obj).className="top_xing_daohang_1";
}
function menu(obj) {
		var menui,menStat;
		for(i = 1; i<=9;i++)
		{
		 var menud="m"+menui
		  if(document.getElementById(menud))
		    {
			    if(obj ==menui)
			    {
			         if(document.getElementById(menud).className="top_xing_daohang_1")
			         {
				        document.getElementById(menud).className="top_xing_daohang_3";
				     }
			    }
			    else
			    {
			         if(document.getElementById(menud).className="top_xing_daohang_1")
			         {
				         document.getElementById(menud).className="top_xing_daohang_2";
				     }
			    }
			}
		}
}
function menuout(obj) {
		var d="m"+obj
		 if(document.getElementById(d))
		 {
	         if(document.getElementById(d).className!="top_xing_daohang_1")
	         {
		         document.getElementById(d).className="top_xing_daohang_2";
		       
		     }
		  }   
}