//A-Z tab display
function highlightTab(tab) {
	for (var i=0; i<objAZLinks.length; i++) {
		if (objAZLinks[i] == tab) {
			objAZLinks[i].className = "AZListSelected";
		}
		else {
			objAZLinks[i].className = "";
		}
	}
}
function lastTopic() {
	var lastLetterSeen = readCookie('wmdLastSeen');
	if (lastLetterSeen) {
		showAZ(objAZLinks[lastLetterSeen]);
		document.getElementById('firstaid-az').src = AZLetter.toLowerCase();
	}
	else {
		showAZ(objAZLinks[0]);
	}
}
function showAZ(objA) {
	AZLetter = getInner(objA);
	highlightTab(objA);
	createCookie('wmdLastSeen', AZLetter, 90);
}


function getInner(obj) {
	if (obj.innerText) {
		return obj.innerText.replace(' ','');
	} else {
		return obj.textContent.replace(' ','');
	}
}

/* Cookies */
function createCookie(name,value,days) {
	value2 = changeValue(value);
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value2+expires+"; path=/";
	//alert('successfully created');
}

function changeValue(value) {
	if (value == 'A') {return 0;} 
	if (value == 'B') {return 1;} 
	if (value == 'C') {return 2;}
	if (value == 'D') {return 3;}
	if (value == 'E') {return 4;}
	if (value == 'F') {return 5;}
	if (value == 'G') {return 6;}
	if (value == 'H') {return 7;}
	if (value == 'I') {return 8;}
	if (value == 'J') {return 9;}
	if (value == 'K') {return 10;}
	if (value == 'L') {return 11;}
	if (value == 'M') {return 12;}
	if (value == 'N') {return 13;}
	if (value == 'O') {return 14;}
	if (value == 'P') {return 15;}
	if (value == 'Q') {return 16;}
	if (value == 'R') {return 17;}
	if (value == 'S') {return 18;}
	if (value == 'T') {return 19;}
	if (value == 'U') {return 20;}
	if (value == 'V') {return 21;}
	if (value == 'W') {return 22;}
	if (value == 'X') {return 23;}
	if (value == 'Y') {return 24;}
	if (value == 'Z') {return 25;}
}
function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) 	{
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}