function welcomeshow(divid,i)
{
    var n1=document.getElementById("n1");
    var n2=document.getElementById("n2");
    var n3=document.getElementById("n3");
    var n4=document.getElementById("n4");
    
    n1.style.display="none";
    n2.style.display="none";
    n3.style.display="none";
    n4.style.display="none";
    
    var divid=document.getElementById(divid);
    divid.style.display = "block";
    
    var img_d3=document.getElementById("img_d1");
    var img_d5=document.getElementById("img_d2");
    var img_d7=document.getElementById("img_d3");
    var img_d9=document.getElementById("img_d4");
    img_d3.src = "images/jiaodian_01.jpg";
    img_d5.src = "images/jiaodian_02.jpg";
    img_d7.src = "images/jiaodian_03.jpg";
    img_d9.src = "images/jiaodian_04.jpg";
    
    var img = document.getElementById("img_d"+i);
    
    img.src = 'images/jiaodian_0'+i+'_over.jpg';
   
    
}
function ShowDiv(DivID){
   
 document.getElementById("divlist").style.display='none'; 
    document.getElementById("divcontent").style.display='none'; 
      document.getElementById("divshow").style.display='none'; 
    document.getElementById("divshow1").style.display='block'; 
    document.getElementById(DivID).style.display='block';
    
}
function ShowDiv1(DivID){
   
    
    
    
     document.getElementById("divlist").style.display='none'; 
    document.getElementById("divcontent").style.display='none'; 
      document.getElementById("divshow").style.display='block'; 
    document.getElementById("divshow1").style.display='none'; 

    document.getElementById(DivID).style.display='block';

}