//here you place the ids of every element you want.
	var ids=new Array('page_1','page_2','page_3','page_4','page_5','page_6','page_7','page_8','page_9','page_10','page_11','page_12','page_13','page_14','page_15');
	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';
	}
	}
	}