//here you place the ids of every element you want.
var onlineids=new Array('week1','week2','week3','week4','week5','week6','week7','week8','week9','week10','week11','week12','week13','week14','week15');
var offlineids=new Array('week1-2','week3-4','week5-6','week7-8','week9-10','week11-12','week13-14');

function switchonlineid(id){	
	hideallonlineids();
	showdiv(id);
}

function switchofflineid(id){	
	hideallofflineids();
	showdiv(id);
}

function hideallonlineids(){
	//loop through the array and hide each element by id
	for (var i=0;i<onlineids.length;i++){
		hidediv(onlineids[i]);
	}		  
}

function hideallofflineids(){
	//loop through the array and hide each element by id
	for (var i=0;i<offlineids.length;i++){
		hidediv(offlineids[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';
		}
	}
}