function isEmail (emailStr) {
  if (emailStr.match( new RegExp( '^(\\s*)(("[^"]*")|\\w+([*&+~!-\\.]\\w+)*)@\\w+([-\\.]\\w+)*\\.\\w{1,3}(\\s*)$' ) ) == null )
	return false;
  return true;
}

function isNumber (sText) {
   var ValidChars = "0123456789";
   var IsNumber=true;
   var Char;
 
   for (i = 0; i < sText.length && IsNumber == true; i++) { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) {
         IsNumber = false;
      }
   }
   return IsNumber;
}