function showrep(){
   var element = document.getElementById('area');
   var id = element.value;

   for (var i = element.length - 1; i > 0 ; i--)
   {  document.getElementById(element.options[i].value).style.display = "none";
   }// end for

   if(document.getElementById(id).style.display == "none")
   {  document.getElementById(id).style.display = "block";
   }//end-if

}//end function showhide