Can you optimize this replace code?

[podenphant]

String.prototype.replace = function() {
str = this
str=str.split("Š").join("Å*");
str=str.split("š").join("Å¡");
str=str.split("œ").join("Å“");
str=str.split("ž").join("ž");
str=str.split("Ÿ").join("Ÿ");
str=str.split("¢").join("¢");
str=str.split("¥").join("Â¥");
str=str.split("À").join("À");
str=str.split("Á").join("Ã�");
str=str.split("Â").join("Â");
str=str.split("Ã").join("Ã");
str=str.split("Ä").join("Ä");
[about 200 more characters ... ]
return str;
}
Don't ask me how we landed on this crappy solution ...
If you have an idea on how to optimize the code at you will make a lot of poor processors very happy

Regards
POD