// Internal variables (don't edit or you will invoke the Wrath of the WebDesigner)
var W3CDOM = (document.createElement && document.getElementsByTagName);
var checkSS, checkAU, checkNews, emailRow, emailZipRow, printFormRow;

//document.body.onload = init;
if (window.addEventListener) {
	window.addEventListener('load', init, false);
} else if (window.attachEvent) {
window.attachEvent('onload', init);
}


function showHide(checkbox, element) {
	if (checkbox.checked) {
		element.style.display = "block";
		element.style.visibility = "visible";
	} else {
		element.style.display = "none";
		element.style.visibility = "hidden";
	}
}

function showHideEmail(checkSS, checkAU, emailRow) {
	if (checkSS.checked || checkAU.checked) {
		emailRow.style.display = "block";
		emailRow.style.visibility = "visible";
	} else {
		emailRow.style.display = "none";
		emailRow.style.visibility = "hidden";
	}
}

function showHideAll() {
		showHideEmail(checkSS, checkAU, emailRow);
		showHide(checkNews, printFormRow);
}

function init() {
	if (!W3CDOM) return;
	checkSS = document.getElementById('chkEmail_aiginfo');
	checkAU = document.getElementById('chkEmail_aignews');
	checkNews = document.getElementById("chkUpdateSignup");
	emailRow = document.getElementById("emailRow");
	emailZipRow = document.getElementById("emailZipRow");
	printFormRow = document.getElementById("printFormRow");
	
	showHideAll();
	
	checkSS.onclick = function() {
		showHideEmail(checkSS, checkAU, emailRow);
	}
	
	checkAU.onclick = function() {
		showHideEmail(checkSS, checkAU, emailRow);
	}
	
	checkNews.onclick = function() {
		showHide(checkNews, printFormRow);
	}
}