var min=4;
var max=24;

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=/";
}

function readCookie(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) {
	createCookie(name,"",-1);
}



function resetSize() {
var p = document.getElementsByClassName('content_left');
for(i=0;i<p.length;i++) {
    if(p[i].style.fontSize) {
	s = 14;
    }
    p[i].style.fontSize = s+"px"
}
eraseCookie('currentsize');
createCookie('currentsize',s,7);
}

function increaseFontSize() {
    
    
var p = document.getElementsByClassName('content_left');
for(i=0;i<p.length;i++) {
    if(p[i].style.fontSize) {
	var s = parseInt(p[i].style.fontSize.replace("px",""));
    } else {
	var s = 14;
    }
    if(s!=max) {
	s += 1;
    }
    p[i].style.fontSize = s+"px"
}
eraseCookie('currentsize');
createCookie('currentsize',s,7);
}
function decreaseFontSize() {
var p = document.getElementsByClassName('content_left');
for(i=0;i<p.length;i++) {
    if(p[i].style.fontSize) {
	var s = parseInt(p[i].style.fontSize.replace("px",""));
    } else {
	var s = 14;
    }
    if(s!=min) {
	s -= 1;
    }
    p[i].style.fontSize = s+"px"
}   
eraseCookie('currentsize');
createCookie('currentsize',s,7);
}