// JavaScript Document
	function $(element){return document.getElementById(element);}

<!--Ê×Ò³//-->
function changeall(){
        for(i=1;i<=3;i++)
        {
            $(i+"n").style.display="none";
            $(i+"f").style.display="";
        }     
    }
function changeall1(){
      for(i=4;i<=6;i++)
        {
            $(i+"n").style.display="none";
            $(i+"f").style.display="";
        }     
    }
function changeall2(){
        for(i=7;i<=9;i++)
        {
            $(i+"n").style.display="none";
            $(i+"f").style.display="";
        }     
    }
function change(a){
         changeall();
        $(a+"n").style.display="";$(a+"f").style.display="none";
          
}
function change1(a){
         changeall1();
        $(a+"n").style.display="";$(a+"f").style.display="none";
          
}function change2(a){
         changeall2();
        $(a+"n").style.display="";$(a+"f").style.display="none";
          
}

function MM_showHideLayers() { //v9.0
  
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) 
  with (document) if (getElementById && ((obj=getElementById(args[i]))!=null)) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}