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

function prepareStyleSheets() 
{
   var i, a;
   for(i=0; (a = document.getElementsByTagName("link")[i]); i++) 
   {
     if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) 
       a.disabled = a.getAttribute("rel").indexOf('alter') != -1;
   }
	if (screen.width > 800)
		if (screen.width > 1280)
			setActiveStyleSheet('wide');
		else
			setActiveStyleSheet('medium');
	else
		setActiveStyleSheet('smal');
}

prepareStyleSheets();