function increaseFontSize() {
    var p = document.getElementsByTagName('p');
    for(i=0;i<p.length;i++) {
	if(p[i].style.fontSize) {
	    var s = parseInt(p[i].style.fontSize.replace("%",""));
	} else {
	    var s = "100.1";
	}
     
	s += 10;
     
	p[i].style.fontSize = s+"%"
	    }
}

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 decreaseFontSize() {
    var p = document.getElementsByTagName('p');
    for(i=0;i<p.length;i++) {
	if(p[i].style.fontSize) {
	    var s = parseInt(p[i].style.fontSize.replace("%",""));
	} else {
	    var s = "100.1";
	}
     
	s -= 10;
     
	p[i].style.fontSize = s+"%"
	    }   
}
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 expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
}

window.onload = function() {
    var fsize = readCookie("fsize");
    if(fsize == null) {
        fsize = "100.1";
    }
    var p = document.getElementsByTagName('p');
    for(i=0;i<p.length;i++) {
        p[i].style.fontSize = fsize+"%";
    }
}
    
    window.onunload = function(e) {
	var p = document.getElementsByTagName('p');
	for(i=0;i<p.length;i++) {
	    var fsize =  parseInt(p[i].style.fontSize.replace("%",""));
	}
	if(fsize == null) {
	    fsize = "100.1";
	}
	createCookie("fsize", fsize, 365);
    }
    var fsize = readCookie("fsize");
    if(fsize == null) {
        fsize = "100.1";
    }
    var p = document.getElementsByTagName('p');
    for(i=0;i<p.length;i++) {
        p[i].style.fontSize = fsize+"%";
    }