The best way to solve this problem is using UTF-8 encoding in your webpages.
This is what you have in your webpages source (pay attention to charset=iso-8859-1)
<html>
<head>
<meta content="text/html; charset=iso-8859-1" http-equiv="Content-Type"/>
.....
If you use charset=UTF-8 all your content will be alright.
Example:
<html>
<head>
<meta content="text/html; charset=iso-UTF-8" http-equiv="Content-Type"/>
.....