So I'm trying to decode this string %21%22%23%C2%A4%25%26%2F to !"#¤%&/ inside my confirm so it doesn't say the encoded string in the confirm, but the actual string. But how can I do this?

I tried something like this, but it doesn't work.

...
if(confirm('Are you sure you want to removed the JQL: ' + decodeStr(encoded_string_value))){
...
}

function decodeStr(strVal) {
    var decodeStr = '';
    if(strVal && typeof strVal === 'string') {
        // strip script/html tags
        decodeStr = strVal.replace(/<script[^>]*>([\S\s]*?)<\/script>/gmi, '');
        decodeStr = decodeStr.replace(/<\/?\w(?:[^"'>]|"[^"]*"|'[^']*')*>/gmi, '');
        return decodeStr;
    }
}

Is there another way of doing this?