// detect browser support for getElementById and createElement
var canGetElem = false;
var canCreateElem = false;
if (document.getElementById) {
    canGetElem = true;
    if (document.createElement) {
        canCreateElem = true;
    }
}


/* ---- font size change  ---- */
/* --------------------------- */

var curFontSize = 8; 	// curFontSize needs to be the same as the font size for paragraphs, as set in the css (in pixels)
var fontModifier = 2; 	// how much to increase/decrease font size each time (in pixels)

function fontSize(act) {
    if (canGetElem) {
        tmpStoryBody = document.getElementById("pageBody");
        if (act == 1) {
            curFontSize += fontModifier;
            curFontSize = Math.min(curFontSize, 41);
        }
        else if (act == 0) {
            curFontSize -= fontModifier;
            curFontSize = Math.max(curFontSize, 9);
        }
        tmpStoryBody.style.fontSize = curFontSize + "px";
		for (v = 0; v < tmpStoryBody.getElementsByTagName("p").length; v++) {
           tmpStoryBody.getElementsByTagName("p")[v].style.fontSize = curFontSize + "px";  }
        //setLeftnavLineLength();
    }
	// set cookie with font size
	var expdate = new Date();
	FixCookieDate (expdate);
	expdate.setTime (expdate.getTime() + (672*60*60*1000)); // 4 weeks
	SetCookie("userfontc",curFontSize,expdate);		
}

var userfont = GetCookie ('userfontc');

if (userfont>1) {} else {userfont=11;}

function fontCookie() {
	ufd = ((userfont - curFontSize)/2);
	if (userfont >= 11) {
		for (i=0;i<ufd;i++) {
			fontSize(1);
		}	
	} else {
		fontSize(0);
	}	
}

// cookies
function getCookieVal(offset) {
	var endstr = document.cookie.indexOf (";", offset);
	if (endstr == -1)
	endstr = document.cookie.length;
	return unescape(document.cookie.substring(offset, endstr));
}

function FixCookieDate(date) {
	var base = new Date(0);
	var skew = base.getTime();
	if (skew > 0) 
		date.setTime (date.getTime() - skew);
}

function GetCookie(name) {
	var arg = name + "=";
	var alen = arg.length;
	var clen = document.cookie.length;
	var i=0;
	while (i < clen) {	
		var j = i + alen;
		if (document.cookie.substring(i, j) == arg)
		return getCookieVal (j);
		i = document.cookie.indexOf(" ", i) + 1;
		if (i == 0) break;
		}
	return null;
}

function SetCookie(name,value,expires,path,domain,secure) {
	document.cookie = name + "=" + escape (value) +
	((expires) ? "; expires=" + expires.toGMTString() : "") +
	((path) ? "; path=" + path : "") +
	((domain) ? "; domain=" + domain : "") +
	((secure) ? "; secure" : "");
}

// end cookies

/* ------------------------------ */
/* ---- // font size change  ---- */