function menu(val)
{
if (val==0)
{
  document.getElementById('Home').className="selected"
  document.getElementById('aboutus').className=""
  document.getElementById('industry').className=""
  document.getElementById('publications').className=""
  document.getElementById('exhibitions').className=""
  document.getElementById('regulations').className=""
  document.getElementById('groups').className=""
  
}

else if (val==1)
{
 document.getElementById('Home').className=""
  document.getElementById('aboutus').className="selected"
  document.getElementById('industry').className=""
  document.getElementById('publications').className=""
  document.getElementById('exhibitions').className=""
  document.getElementById('regulations').className=""
  document.getElementById('groups').className=""

  
}

else if(val==2)
{
  document.getElementById('Home').className=""
  document.getElementById('aboutus').className=""
  document.getElementById('industry').className="selected"
  document.getElementById('publications').className=""
  document.getElementById('exhibitions').className=""
  document.getElementById('regulations').className=""
  document.getElementById('groups').className=""

  
}

else if (val==3)
{
 document.getElementById('Home').className=""
  document.getElementById('aboutus').className=""
  document.getElementById('industry').className=""
  document.getElementById('publications').className="selected"
  document.getElementById('exhibitions').className=""
  document.getElementById('regulations').className=""
  document.getElementById('groups').className=""

  
}

else if (val==4)
{
 document.getElementById('Home').className=""
  document.getElementById('aboutus').className=""
  document.getElementById('industry').className=""
  document.getElementById('publications').className=""
  document.getElementById('exhibitions').className="selected"
  document.getElementById('regulations').className=""
  document.getElementById('groups').className=""

  
}

else if (val==5)
{
  document.getElementById('Home').className=""
  document.getElementById('aboutus').className=""
  document.getElementById('industry').className=""
  document.getElementById('publications').className=""
  document.getElementById('exhibitions').className=""
  document.getElementById('regulations').className="selected"
  document.getElementById('groups').className=""
  
}

else if (val==6)
{
 document.getElementById('Home').className=""
  document.getElementById('aboutus').className=""
  document.getElementById('industry').className=""
  document.getElementById('publications').className=""
  document.getElementById('exhibitions').className=""
  document.getElementById('regulations').className=""
  document.getElementById('groups').className="selected"
  
}
}