// JavaScript Document
$(document).ready(function(){  
var fonte = 1.065;
var line = 1.35;
    $('#aumenta_fonte').click(function(){  
        if (fonte<1.8){  
            fonte = fonte+0.05;
			line = line+0.02;
            $('#texto').css({'font-size' : fonte+'em','line-height' : line+'em'});
        }  
    });  
    $('#reduz_fonte').click(function(){  
        if (fonte>1.065){
            fonte = fonte-0.05;  
			line = line-0.02;
            $('#texto').css({'font-size' : fonte+'em','line-height' : line+'em'});  
        }
    });
});