function hovered(id){
      for( i=1; i<=3; ++i){
        document.getElementById("server-"+i).style.display = 'none';
		document.getElementById("server-button-"+i).className = '';
      }
      document.getElementById("server-"+id).style.display = 'block';
	  document.getElementById("server-button-"+id).className = 'select';
	}
	
	window.onload = function() {
		document.getElementById("server-button-1").onmouseover = function(evt) { hovered('1'); };
		document.getElementById("server-button-2").onmouseover = function(evt) { hovered('2'); };
		document.getElementById("server-button-3").onmouseover = function(evt) { hovered('3'); };
	}