function ShowDiv1(DivID,divstyle){
 
      document.getElementById("div1").style.display='none'; 
    document.getElementById("div2").style.display='none'; 
     document.getElementById("div3").style.display='none'; 
      document.getElementById("div4").style.display='none'; 
    document.getElementById(DivID).style.display='block';

        document.getElementById("n1").className="font_bai_9b";
       
          document.getElementById("n2").className="font_bai_9b";
           document.getElementById("n3").className="font_bai_9b";
            document.getElementById("n4").className="font_bai_9b";
           divstyle.className="font_bai_9bstyle";
    
}
function ShowDiv2(DivID,divstyle){

      document.getElementById("div1").style.display='none'; 
    document.getElementById("div2").style.display='block'; 
     document.getElementById("div3").style.display='none'; 
      document.getElementById("div4").style.display='none'; 
    document.getElementById(DivID).style.display='block';

  
         document.getElementById("n1").className="font_bai_9b";
          document.getElementById("n2").className="font_bai_9b";
           document.getElementById("n3").className="font_bai_9b";
            document.getElementById("n4").className="font_bai_9b";
      
        
             divstyle.className="font_bai_9bstyle";

}
function ShowDiv3(DivID,divstyle){
 
      document.getElementById("div1").style.display='none'; 
    document.getElementById("div3").style.display='block'; 
     document.getElementById("div2").style.display='none'; 
      document.getElementById("div4").style.display='none'; 
    document.getElementById(DivID).style.display='block';
   document.getElementById("n1").className="font_bai_9b";
          document.getElementById("n2").className="font_bai_9b";
           document.getElementById("n3").className="font_bai_9b";
            document.getElementById("n4").className="font_bai_9b";
      
           divstyle.className="font_bai_9bstyle";

}
function ShowDiv4(DivID,divstyle){
 
      document.getElementById("div1").style.display='none'; 
    document.getElementById("div4").style.display='block'; 
     document.getElementById("div2").style.display='none'; 
      document.getElementById("div3").style.display='none'; 
    document.getElementById(DivID).style.display='block';
     document.getElementById("n1").className="font_bai_9b";
          document.getElementById("n2").className="font_bai_9b";
           document.getElementById("n3").className="font_bai_9b";
            document.getElementById("n4").className="font_bai_9b";
    
           divstyle.className="font_bai_9bstyle";

}