function isEmail(str) {

  // are regular expressions supported?
  var supported = 0;
  if (window.RegExp) {
    var tempStr = "a";
    var tempReg = new RegExp(tempStr);
    if (tempReg.test(tempStr)) supported = 1;
  }
  if (!supported) 
    return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
  var r1 = new RegExp("(@.*@)|(\\.\\.)|(@\\.)|(^\\.)");
  var r2 = new RegExp("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$");
  return (!r1.test(str) && r2.test(str));
}


function isPhoneNumber(TheNumber) {
	var valid = 1
	var GoodChars = "0123456789()-+ "
	var i = 0
	if (TheNumber=="") {
		// Return false if number is empty
		valid = 0
	}
	for (i =0; i <= TheNumber.length -1; i++) {
		if (GoodChars.indexOf(TheNumber.charAt(i)) == -1) {
// Note: Remove the comments from the following line to see this
// for loop in action.
// alert(TheNumber.charAt(i) + " is no good.")
			valid = 0
		} // End if statement
	} // End for loop
	return valid
}

function isZip(TheNumber) {
	var valid = 1
	var GoodChars = "0123456789- "
	var i = 0
	if (TheNumber=="") {
		// Return false if number is empty
		valid = 0
	}
	for (i =0; i <= TheNumber.length -1; i++) {
		if (GoodChars.indexOf(TheNumber.charAt(i)) == -1) {
// Note: Remove the comments from the following line to see this
// for loop in action.
// alert(TheNumber.charAt(i) + " is no good.")
			valid = 0
		} // End if statement
	} // End for loop
	return valid
}