Localized Messages from JS validation

[KenCoe]

I have a Struts-based application that has some Javascript-based validation functions. These functions send alerts that are in English. I'm trying to send alerts in either Polish or English depending upon the user's locale setting. Any ideas how to accomplish this? An example of the JS function follows:

function validateAmount(amount){
var regexp = new RegExp("[0-9]+.[0-9][0-9]$");

if (amount.match(regexp)) {
return true;
} else {
alert("Please enter valid amount with two positions after decimal");
return false;
}
}

[Twey]

You want to detect the Accept-Language HTTP header.