window.onload = function(e) {
	document.getElementById('one').style.display = 'inline';
}

function toggle(layer) {

     var layers = new Array("one","two","three","four","five","six","seven","eight","nine","ten");
     
        for (var i = 0; i < layers.length; i++){
              if (document.getElementById(layers[i]) != null){
                  document.getElementById(layers[i]).style.display = 'none';
              }
        }
       
        document.getElementById(layer).style.display = 'inline';
     
}