// http://www.quirksmode.org/js/cookies.html

function setCookie(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=/";
}

function getCookie(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 eraseCookie(name) {
	setCookie(name,"",-1);
}


// http://dhtmlnirvana.com/content/dhtml/fontsize/fontsizer.html

var tags = new Array('p', 'ul');
var sizes =  new Array('10px','11px','12px','13px','14px');
var start = 2;
var name = "eckhardt";

function fontSize(inc)
{
	if (!document.getElementById) return;

	var size = getCookie(name) ? Number(getCookie(name)) : start;
	size += inc;
	if (size < 0) {size = 0;}
	if (size > sizes.length-1) {size = sizes.length-1;}
	if (isNaN(size)) return;
	start = size;
  setCookie(name, size);

	for (var i = 0 ; i < tags.length ; i++ ) {
		var allTags = document.getElementsByTagName(tags[i]);
	for (var k = 0 ; k < allTags.length ; k++)
		allTags[k].style.fontSize = sizes[size];
	}
}