拡大縮小
test
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
this is a some text.
$(function(){
$('button').click(function(){
var size = $('#content').css('font-size');
var fontsize = parseFloat(size,10);
var unit = size.slice(-2);
var cname = $(this).attr('class');
if(cname == "bigger"){
fontsize += 2;
}else if(cname == "smaller"){
fontsize -= 2;
}
$('#content').css('font-size',fontsize+unit);
});
})