/* addRemoveEvent
********************/
function addRemoveEvent(add, el, evt, func){
	if(add){
		if(el.addEventListener) el.addEventListener(evt, func, false);
		else if (el.attachEvent) el.attachEvent("on" + evt, func);
	}else{
		if(el.removeEventListener) el.removeEventListener(evt, func, false);
		else if (el.detachEvent) el.detachEvent("on" + evt, func);
	}
}
/* anchors
********************/
function initAnchors(){
	var anchors = document.getElementsByTagName("a");
	for (var i=0; i<anchors.length; ++i){
		if (!anchors[i].getAttribute("href") || !anchors[i].getAttribute("rel")) continue;
		var relation = String(anchors[i].getAttribute("rel"));
		if (relation.match("popup")) anchors[i].onclick=popup;
		if (relation == "external") anchors[i].onclick=externalLink;
	}
}
function popup(){
	var relation = String(this.getAttribute("rel"));
	if(relation == "popup"){
		window.open(this, "pop", "scrollbars=no");
	}else{
		var arguments = relation.substring(6,relation.length-1).split(";");
		window.open(this,arguments[0],'toolbar=0,location=0,directories=0,status=0,menubar=0,' + arguments[1] + ',resizable=no,width=' + arguments[2] + ',height=' + arguments[3] + ',top=' + arguments[4] + ',left=' + arguments[5]);
	}
	return false;
}
function externalLink(){
	window.open(this);
	return false;
}

/* init
********************/
addRemoveEvent(true, window, "load", initAnchors);

function getWindowHeight() {
			var windowHeight = 0;
			if (typeof(window.innerHeight) == 'number') {
				windowHeight = window.innerHeight;
			}
			else {
				if (document.documentElement && document.documentElement.clientHeight) {
					windowHeight = document.documentElement.clientHeight;
				}
				else {
					if (document.body && document.body.clientHeight) {
						windowHeight = document.body.clientHeight;
					}
				}
			}
			return windowHeight;
		}
		function setFooter() {
    	if (document.getElementById) {
				var windowHeight = getWindowHeight();
				if (windowHeight > 0) {
					var contentHeight = document.getElementById('container').offsetHeight;
					var footerElement = document.getElementById('footer');
					var footerHeight  = footerElement.offsetHeight;
					if (windowHeight - (contentHeight + footerHeight) >= 0) {
						footerElement.style.top = (windowHeight - (contentHeight + footerHeight)) + 'px';
					}
					else {
						footerElement.style.top = '0px';
					}
				}
			}
		}
window.onload = function() {setFooter();}
window.onresize = function() {setFooter();}
window.onchange = function() {setFooter();}