//here you place the ids of every element you want.
  var ids=new Array('mylinks','usefullinks','links');
  
  function switchid(id){	
  	hideallids();
  	showdiv(id);
  }
  
  function hideallids(){
  	//loop through the array and hide each element by id
  	for (var i=0;i<ids.length;i++){
  		hidediv(ids[i]);
  	}		  
  }
  
  function hidediv(id) {
  	//safe function to hide an element with a specified id
  	if (document.getElementById) { // DOM3 = IE5, NS6
  		document.getElementById(id).style.display = 'none';
  	}
  	else {
  		if (document.layers) { // Netscape 4
  			document.id.display = 'none';
  		}
  		else { // IE 4
  			document.all.id.style.display = 'none';
  		}
  	}
  }
  
  function showdiv(id) {
  	//safe function to show an element with a specified id
  		  
  	if (document.getElementById) { // DOM3 = IE5, NS6
  		document.getElementById(id).style.display = 'block';
  	}
  	else {
  		if (document.layers) { // Netscape 4
  			document.id.display = 'block';
  		}
  		else { // IE 4
  			document.all.id.style.display = 'block';
  		}
  	}
  }