function loadcssfile(name){
	var a = getActiveStyleSheet();
	if (a != name) {
		var fileref=document.createElement("link")
		fileref.setAttribute("rel", "stylesheet")
		fileref.setAttribute("type", "text/css")
		fileref.setAttribute("href", name + '.css')
		fileref.setAttribute("title", name)
	
		if (typeof fileref!="undefined")
			document.getElementsByTagName("head")[0].appendChild(fileref)
	}
}

function flipActiveStyleSheet() {
	var a = getActiveStyleSheet();
	if (a == 'black') setActiveStyleSheet('white');
	else setActiveStyleSheet('black');
	return null;
}

function setActiveStyleSheet(title) {
	if (title == 'black') { title = 'black'; }
	else { title = 'white'; }
	var i, a, main;
	loadcssfile(title);
	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
		if(a.getAttribute("rel").indexOf("style") != -1
			&& a.getAttribute("title")) {
			a.disabled = true;
			if(a.getAttribute("title") == title) a.disabled = false;
		}
	}
}

function getActiveStyleSheet() {
	var i, a;
	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
		if(a.getAttribute("rel").indexOf("style") != -1
			&& a.getAttribute("title")
			&& !a.disabled) return a.getAttribute("title");
		}
	return null;
}

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

function getPreferredStyleSheet() {
	var i, a;
	for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
	if(a.getAttribute("rel").indexOf("style") != -1
		&& a.getAttribute("rel").indexOf("alt") == -1
		&& a.getAttribute("title")
		) return a.getAttribute("title");
	}
	return null;
}

function getWindowHeight() {
	if (navigator.appName=="Netscape") {
		return window.innerHeight;
	}
	if (navigator.appName.indexOf("Microsoft")!=-1) {
		return document.body.offsetHeight;
	}
}

function moveBottom() {
	if ($('vectorBottom')) {

		if (getWindowHeight() > document.body.clientHeight) {
			$('vectorBottom').style.top="";
			$('vectorBottom').style.bottom="0px";
		} else {
			$('vectorBottom').style.bottom="";
			$('vectorBottom').style.top=(document.body.clientHeight-$('vectorBottom').offsetHeight)+"px";
		}
	}
}


window.onload = function(e) {
	var cookie = readCookie("style");
	var title = cookie ? cookie : getPreferredStyleSheet();
	setActiveStyleSheet(title);
}

window.onunload = function(e) {
	var title = getActiveStyleSheet();
	createCookie("style", title, 365);

}

window.onscroll = function(e) {
	moveBottom();
}

window.onresize = function(e) {
	moveBottom();
}