function change_class(id)
  { 
    document.getElementById("home").className = 'base_left';
	document.getElementById("homea").className = 'base_right';
	document.getElementById("homea").style.color = 'black';
	document.getElementById("information").className = 'base_left';
	document.getElementById("informationa").className = 'base_right';
	document.getElementById("informationa").style.color = 'black';
	document.getElementById("community").className = 'base_left';
	document.getElementById("communitya").className = 'base_right';
	document.getElementById("communitya").style.color = 'black';
	document.getElementById("relocation").className = 'base_left';
	document.getElementById("relocationa").className = 'base_right';
	document.getElementById("relocationa").style.color = 'black';
	document.getElementById("thenetherlands").className = 'base_left';
	document.getElementById("thenetherlandsa").className = 'base_right';
	document.getElementById("thenetherlandsa").style.color = 'black';
	document.getElementById("news").className = 'base_left';
	document.getElementById("newsa").className = 'base_right';
	document.getElementById("newsa").style.color = 'black';	
	var id1 = id + "a";
    document.getElementById(id).className = 'active1';
	document.getElementById(id1).className = 'active';
	document.getElementById(id1).style.color = 'white';
  }