function picChange(num) {
	document.getElementById("weekImg").src = "img/week" + num + ".jpg";
}

function displayChange(num) {
	if(num == 1) {
		num = "mailExpl";
	}else if(num == 2) {
		num = "copyExpl";
	}
	if((document.getElementById(num).style.display == "block")) {
		document.getElementById(num).style.display = "none";
	}else if((document.getElementById(num).style.display == "none")) {
		document.getElementById(num).style.display = "block";
	}
}