function  secBoard(n)
{  
if(0==n)
{
left_Table1.style.display="block";
left_Table2.style.display="none"; 
left_Table3.style.display="none";  
}
if(1==n)
{
left_Table1.style.display="none";
left_Table3.style.display="none"; 
left_Table2.style.display="block";  
}
if(2==n)
{
left_Table1.style.display="none";
left_Table3.style.display="block"; 
left_Table2.style.display="none";  
}
}

function  rightBoard(n)
{  
if(0==n)
{
righ_Table1.style.display="block";
righ_Table2.style.display="none"; 
righ_Table3.style.display="none";  
}
if(1==n)
{
righ_Table1.style.display="none";
righ_Table3.style.display="none"; 
righ_Table2.style.display="block";  
}
if(2==n)
{
righ_Table1.style.display="none";
righ_Table3.style.display="block"; 
righ_Table2.style.display="none";  
}
}

function  rightsBoard(n)
{  
if(0==n)
{
right_Table1.style.display="block";
right_Table2.style.display="none"; 
right_Table3.style.display="none";  
}
if(1==n)
{
right_Table1.style.display="none";
right_Table3.style.display="none"; 
right_Table2.style.display="block";  
}
if(2==n)
{
right_Table1.style.display="none";
right_Table3.style.display="block"; 
right_Table2.style.display="none";  
}
}

function  xx(n)
{  
if(0==n)
{
xx1.style.display="block";
xx2.style.display="none"; 
xx3.style.display="none";  
xx4.style.display="none";  
}
if(1==n)
{
xx1.style.display="none";
xx3.style.display="none"; 
xx2.style.display="block";  
xx4.style.display="none";  
}
if(2==n)
{
xx1.style.display="none";
xx3.style.display="block"; 
xx2.style.display="none";
xx4.style.display="none";  
}
if(3==n)
{
xx1.style.display="none";
xx3.style.display="none"; 
xx2.style.display="none";
xx4.style.display="block";  
}
}

function  link(n)
{  
if(0==n)
{
link1.style.display="block";
link2.style.display="none"; 
link3.style.display="none";  
link4.style.display="none";  
}
if(1==n)
{
link1.style.display="none";
link3.style.display="none"; 
link2.style.display="block";  
link4.style.display="none";  
}
if(2==n)
{
link1.style.display="none";
link3.style.display="block"; 
link2.style.display="none";
link4.style.display="none";  
}
if(3==n)
{
link1.style.display="none";
link3.style.display="none"; 
link2.style.display="none";
link4.style.display="block";  
}
}