function increaseFont(e) {
	var currentFontSize = e.css('font-size');
    var currentFontSizeNum = parseFloat(currentFontSize,10);
  	var unit = currentFontSize.slice(-2);
	var newFontSize = currentFontSizeNum*1.2;
	e.css('font-size', newFontSize+unit);
}
function decreaseFont(e) {
	var currentFontSize = e.css('font-size');
    var currentFontSizeNum = parseFloat(currentFontSize, 10);
	var unit = currentFontSize.slice(-2);
    var newFontSize = currentFontSizeNum*0.8;
    e.css('font-size', newFontSize+unit);
}

$(document).ready(function(){
  
  // Increase Font Size
  $(".increaseFont").click(function(){
	$('a,p,label,h3,h4,h5,h6,input,span').each(function (){
		increaseFont($(this));
	});
	return false;
  });
  // Decrease Font Size
  $(".decreaseFont").click(function(){
	$('a,p,label,h3,h4,h5,h6,input,span').each(function (){
		decreaseFont($(this));
	});
    return false;
  });
});