$(document).ready(function () {

$(function(){
		$('.botao-tamanho-fonte').click(function(){
			var original = 12;
			var limite = 8;

			var objeto = $('#main-content').length ? $('#main-content') : $('.divMiolo');
			
			var currFontSize = objeto.css('fontSize');
			var finalNum = parseFloat(currFontSize, 10);
			var stringEnding = currFontSize.slice(-2);
			if(this.id == 'aumenta-fonte' && finalNum < original + limite) {
				finalNum += 1;
			}
			else if (this.id == 'diminui-fonte' && finalNum > original - limite){
				finalNum -=1;
			}
			objeto.css('fontSize', finalNum + stringEnding);
		});
	});

} );