var x='';
            var y;
            function displayData(id, obj)
            {
            if(x==''){
            document.getElementById(id).style.display="block";
            x=document.getElementById(id);
            obj.style.fontWeight="bold";
            y=obj;
            }
            else{
            x.style.display="none";
            y.style.fontWeight="normal";
            document.getElementById(id).style.display="block";
            x=document.getElementById(id);
            obj.style.fontWeight="bold";
            y=obj;
            }
         
            }