if ((c>='0' && c<='9') || (c>='A' && c<='Z') || (c>='a' && c<='z') || c>'~') {
if (isalpha(c) || isdigit(c) || c>'~') {
Strip(const nsString& text, nsString& stripText) {  for (PRUint32 i=0; i<text.Length(); i++) {    PRUnichar c = text.CharAt(i);    if ((c>='0' && c<='9') || (c>='A' && c<='Z') || (c>='a' && c<='z') || c>'~') {      stripText += c;    }  }  return stripText;}