function selectTab(elem){
	$$('a.sel').each(function(el){
		el.removeClass('sel');
	});
	$(elem).addClass('sel');
	var count=0;
	$$('div.textsel').each(function(el){
		el.removeClass('textsel');
	});
	$('text'+elem.id).addClass('textsel');
}

function getBrowserHeight() { 
	if (window.innerHeight) {return window.innerHeight;}	
	else if (document.documentElement && document.documentElement.clientHeight != 0) {
		return document.documentElement.clientHeight;
	}
	else if (document.body) {return document.body.clientHeight;}
	return 0;
}

function getBrowserWidth() { 
	if (window.innerWidth) {return window.innerWidth;}	
	else if (document.documentElement && document.documentElement.clientWidth != 0) {
		return document.documentElement.clientWidth;
	}
	else if (document.body) {return document.body.clientWidth;}
	return 0;
}

function setViewportDim(){
	x = getBrowserWidth() - 100;
	y = getBrowserHeight() - 120;
	$$('a.mb').each(function(el){
		el.setAttribute("rel","mediabox ["+x+" "+y+"]");
	});
}

function determineStyle() { //inspired by A List Apart - www.alistapart.com
	var browserWidth = getBrowserWidth();
	if(browserWidth <= 1150) {
	 	for(var q = 0; (a = document.getElementsByTagName("link")[q]); q++) {
	 		if(a.getAttribute("title") == "wide") a.disabled = true;
        	else if(a.getAttribute("title") == "narrow") a.disabled = false;
	 	}
 	}
 	if(browserWidth > 1150) {
		for(var q = 0; (a = document.getElementsByTagName("link")[q]); q++) {
	 		if(a.getAttribute("title") == "narrow") a.disabled = true;
			else if(a.getAttribute("title") == "wide") a.disabled = false;
 		}
 	}
}

function doResize() {
	determineStyle();
}

window.onresize = doResize;
window.onload = function(){
	determineStyle();
	setViewportDim();
}