// JavaScript Document

//browser detection

var isIE = false;
var isSafari = false;

if (navigator.appName.toUpperCase() == "MICROSOFT INTERNET EXPLORER") { 
	isIE = true;
}

if (navigator.vendor) {
	if (navigator.vendor.substring(0,5).toUpperCase() == "APPLE") { //Safari
		isSafari = true;
	}
}

function addBrowserStylesheets() {
	if (isSafari) {
		document.writeln('<link rel="stylesheet" type="text/css" href="stylesheets/safari.css" />');
	}
}

//global variables

function pageResized() { //unused
	
	return;
	
	var body_element = document.getElementsByTagName("body")[0];
	document_height = body_element.offsetHeight;
	
	var winH;
	if (window.innerHeight) {
		winH = window.innerHeight;
	} else if (document.body.offsetHeight) {
		winH = document.body.offsetHeight;
	} else {
		winH = 0;
	}
	
	var maxH;
	if (winH > document_height) {
		maxH = winH;
	} else {
		maxH = document_height;
	}
	
	document.getElementById('background_div').style.height = maxH + "px";
	document.getElementById('bg_bottom').style.visibility = "visible";
	
	window.setTimeout(pageResized,500); //called after page is fully rendered
	//window.setInterval(pageResized,1000);
}

function pageLoaded() {
	/*
		this function is called immediately after the page has finished loading.
	*/
	
	pageResized();
	window.onresize = pageResized;
	
	if (isIE) {
		fixIEmenu();
	}
}

function fixIEmenu() {
	/*
		emulate
		display: table-cell; 
		vertical-align: middle; 
		set in the IE stylesheet
		
		if, by the time you are reading this, IE properly supports "display: table-*" and "vertical-align: middle",
		you may want to remove this and the respective overrides in ie.css
	*/
	var anchors = document.getElementsByTagName("a");
	var h2s = document.getElementsByTagName("h2");
	
	for (var i = 0; i < anchors.length; ++i) {
		if (isInMenu(anchors[i])) {
			if (anchors[i].parentNode.tagName != "H2") {
				anchors[i].innerHTML = 
				"<table cellpadding=\"0\" cellspacing=\"0\" onclick=\"activateLink(this.parentNode);\"><tr><td height=\"40\" valign=\"middle\" style=\"cursor: pointer; padding-left: 15px;\">"+anchors[i].innerHTML+"</td></tr></table>";
			} else {
				anchors[i].innerHTML = 
				"<table cellpadding=\"0\" cellspacing=\"0\" onclick=\"activateLink(this.parentNode);\"><tr><td height=\"40\" valign=\"middle\" style=\"cursor: pointer;\">"+anchors[i].innerHTML+"</td></tr></table>";
			}
		}
	}
	
	for (var i = 0; i < h2s.length; ++i) {
		if (isInMenu(h2s[i]) && (h2s[i].firstChild.tagName != "A")) {
			h2s[i].innerHTML = 
				"<table cellpadding=\"0\" cellspacing=\"0\"><tr valign=\"middle\"><td height=\"40\" valign=\"middle\" style=\"text-align: center;\">"+h2s[i].innerHTML+"</td></tr></table>";
		}
	}
	
}

function activateLink(link_element) {
	/* emulates link behaviour for IE, just another Microsoft brain damage */
	var h = link_element.href;
	var t = link_element.target;
	
	if (t == "_blank") {
		window.open(h);
	} else {
		document.location = h;
	}
}

function isInMenu(element) { 
	//recursively test if an element is part of "menu"
	if (element.id == "menu") {
		return true;
	}
	if (!element.parentNode) {
		return false;
	} else {
		return isInMenu(element.parentNode);
	}
}

function findPos(obj) { //returns the position of obj in [x,y]. Recursive implementation =)
	if ((obj.offsetParent) && (obj.offsetParent.tagName != "BODY") && (obj.offsetParent.tagName != "body") 
			&& (obj.offsetParent.tagName != "HTML") && (obj.offsetParent.tagName != "html")) {
		return [findPos(obj.offsetParent)[0]+obj.offsetLeft, findPos(obj.offsetParent)[1]+obj.offsetTop];
	} else {
		return [obj.offsetLeft, obj.offsetTop];
	}
}