//Jacob Larsen                               
//IT-Konsulent                                
//Web-Teknik / (DUP)                   
//Det Kongelige Bibliotek.                              
//email: jac@kb.dk
	
	function increase(val){
		if(document.getElementsByTagName('body')[0].style.fontSize==''){
			var initSize = 75+'%';
		}else{
			var initSize = document.getElementsByTagName('body')[0].style.fontSize;
		}
		var a = initSize.substring(0,initSize.indexOf('%'));
		var c = a*1 + val;
		
		document.getElementsByTagName('body')[0].style.fontSize = c+'%';
                createCookie('dk.kb.www.fontSize',c+'%',10000);
	}
	
	function decrease(val){
		if(document.getElementsByTagName('body')[0].style.fontSize==''){
			var initSize = 75+'%';
		}else{
			var initSize = document.getElementsByTagName('body')[0].style.fontSize;
		}
		var a = initSize.substring(0,initSize.indexOf('%'));
		var c = a*1 - val;
		document.getElementsByTagName('body')[0].style.fontSize = c+'%';
                createCookie('dk.kb.www.fontSize',c+'%',10000);
	}


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 var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}