function encryptString(exposedField, encryptedField) 
{
    var encoded = "";
    var original = escape(exposedField.value);
	var fake = "";

    for(i=0; i < original.length;i++) 
	{
        encoded += original.charCodeAt(i) - 23;
    }

	for(i=0; i < (exposedField.value).length;i++) 
	{
        // create a fake password
		fake += "*";
    }

    encryptedField.value = encoded;

	// replace the original value with the fake so the original doesn't get submitted
	exposedField.value = fake;
	
}