// This Javascript is written by Peter Velichkov (http://blog.creonfx.com)
// and is distributed under the following license : http://creativecommons.org/licenses/by-sa/3.0/
// Use and modify all you want just keep this comment. Thanks

eraseCookie('textsize');
var incdec = 0;

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 loadCss(x){
  //x increases font size
  var oldFontSize = $('font-size').innerText;
  var newSize = parseInt(oldFontSize) + x;
  $$('.nav').setStyles({ "font-size": newSize + "pt" });
  $$('.sideNavLink').setStyles({ "font-size": newSize + "pt" });
  $$('.bodyLink').setStyles({ "font-size": newSize + "pt" });
  $$('.bodyLink2').setStyles({ "font-size": newSize + "pt" });
  $$('.rightpane').setStyles({ "font-size": newSize + "pt" });
  $$('P', 'TD', 'H1', 'TR', 'TABLE', 'DIV','SPAN').each(function(item) {
    item.setStyles({"font-size":newSize+"pt"});
  });
  $$('.font-resizer').setStyles({ "font-size": "14px" });
}

function increaseFontSize() {
	if(incdec < 10){
		incdec++;
		loadCss(incdec);
		createCookie('textsize',incdec,1); 
	}
}

function decreaseFontSize() {
	if(incdec > -5){
		incdec--;
		loadCss(incdec);
		createCookie('textsize',incdec,1); 
	}		
}

var x = readCookie('textsize')
if (x && x!=0) {
	x = parseInt(x);
	incdec = x;
	loadCss(x);
}