function showHide(whichDiv) {
   if (whichDiv == "product"){
      document.getElementById("divbusiness").style.display = "none";
      document.getElementById("divproduct").style.display = "block";
     
      if (document.getElementById("divbio") != null){
        document.getElementById("divbio").style.display = "none";
      }
   } else if (whichDiv == "business"){
       document.getElementById("divbusiness").style.display = "block";
       document.getElementById("divproduct").style.display = "none";
       
      if (document.getElementById("divbio") != null){
        document.getElementById("divbio").style.display = "none";
      }
   } else if (whichDiv == "bio"){
       document.getElementById("divbio").style.display = "block";
       document.getElementById("divbusiness").style.display = "none";
       document.getElementById("divproduct").style.display = "none";
     
     
   }
}