function toggle( targetId ){
  if (document.getElementById){
	  target1 = document.getElementById("page1")
	  target1.style.display = "none";
	  target2 = document.getElementById("page2")
	  target2.style.display = "none";
	  target3 = document.getElementById("page3")
	  target3.style.display = "none";
	  target4 = document.getElementById("page4")
	  target4.style.display = "none";
	  target5 = document.getElementById("page5")
	  target5.style.display = "none";
	  target6 = document.getElementById("page6")
	  target6.style.display = "none";
	  
	  target = document.getElementById( targetId );
	  target.style.display = "";
  	}
}