// Form Guard

// Copyright Xin Yang 2003
// Web Site: www.yxScripts.com
// EMail: m_yangxin@hotmail.com

// This script is free as long as the copyright notice remains intact.

var reInt=/^\d+$/;
var reSignedInt=/^(\+|-)?\d+$/;
var reFloat=/^\d+(\.\d+)?$/;
var reSignedFloat=/^(\+|-)?\d+(\.\d+)?$/;
var reChar=/^[\w\-]+$/;
var reEMail=/^\w[\w\-\.\*]+\@\w[\w\-]+(\.[\w\-]+)+$/;
var reIP=/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/;
var rePostalCA=/^(\w\d){3}$/;
var reTemplateName=/^[\w\-]+\.html$/i;
var reUploadFileName=/^[\w\-\. ]+$/;
var reUserName=/^[\w\. ]{4,12}$/;
var reExcelFileName=/^.+\.xls$/i;

function rpChar(f) {
  var df=f;

  df=df.replace(/\\/g, '\\\\');
  df=df.replace(/\//g, '\\\/');
  df=df.replace(/\[/g, '\\\[');
  df=df.replace(/\]/g, '\\\]');
  df=df.replace(/\(/g, '\\\(');
  df=df.replace(/\)/g, '\\\)');
  df=df.replace(/\{/g, '\\\{');
  df=df.replace(/\}/g, '\\\}');
  df=df.replace(/\</g, '\\\<');
  df=df.replace(/\>/g, '\\\>');
  df=df.replace(/\|/g, '\\\|');
  df=df.replace(/\*/g, '\\\*');
  df=df.replace(/\?/g, '\\\?');
  df=df.replace(/\+/g, '\\\+');
  df=df.replace(/\^/g, '\\\^');
  df=df.replace(/\$/g, '\\\$');

  return df;
}

function rePhone(f) {
  var df=rpChar(f);

  df=df.replace(/d/gi, '\\d');
  df=df.replace(/w/gi, '(\\w|\\d)');

  return new RegExp('^'+df+'$');
}

function reDate(f) {
  var df=rpChar(f);

  df=df.replace(/dd/gi, '\\d\\d');
  df=df.replace(/mm/gi, '\\d\\d');
  df=df.replace(/yyyy/gi, '\\d\\d\\d\\d');

  return new RegExp('^'+df+'$');
}

function reCharNM(n,m) {
  return new RegExp("\^[\\w\\-]{"+n+","+m+"}\$");
}

function reNumberN(n,mode) {
  return new RegExp("\^"+(mode!=0?"(\\+\|-)?":"")+"\\d{1,"+n+"}\$");
}

function reNumberN2(n,mode) {
  return new RegExp("\^"+(mode!=0?"(\\+\|-)?":"")+"\\d{"+n+"}\$");
}

function reNumberNM(n,m,mode) {
  return new RegExp("\^"+(mode!=0?"(\\+\|-)?":"")+"\\d{1,"+n+"}(\\.\\d{1,"+m+"})?\$");
}

function reNumberNM2(n,m,mode) {
  return new RegExp("\^"+(mode!=0?"(\\+\|-)?":"")+"\\d{"+n+"}\\.\\d{"+m+"}\$");
}

function _checkIt(re, field, msg) {
  if (!re.test(field.value)) {
    alert(msg);

    field.select();
    field.focus();

    return false;
  }

  return true;
}

function goodTemplateName(field, msg) {
  return _checkIt(reTemplateName, field, msg);
}

function goodExcelFileName(field, msg) {
  return _checkIt(reExcelFileName, field, msg);
}

function goodUserName(field, msg) {
  return _checkIt(reUserName, field, msg);
}

function goodPhone(pf, field, msg) {
  return _checkIt(rePhone(pf), field, msg);
}

function goodPostalCA(field, msg) {
  return _checkIt(rePostalCA, field, msg);
}

function goodDate(df, field, msg) {
  if (_checkIt(reDate(df), field, msg)) {
    var di=field.value;
    var y4=df.search(/yyyy/i), y=di.substring(y4, y4+4)-0;
    var m2=df.search(/mm/i), m=di.substring(m2, m2+2)-1;
    var d2=df.search(/dd/i), d=di.substring(d2, d2+2)-0;

    var dd=new Date(y, m, d);
    if (y==dd.getFullYear() && m==dd.getMonth() && d==dd.getDate()) {
      return true;
    }
    else {
      alert(msg);

      field.select();
      field.focus();
    }
  }

  return false;
}

function goodIP(field, msg) {
  return _checkIt(reIP, field, msg);
}

function goodValue(field, msg) {
  if (!field.value) {
    alert(msg);
    //field.select();
    field.focus();
    return false;
  }
  return true;
}

function goodValue2(field, msg) {
  if (!field.value) {
    alert(msg);
    return false;
  }
  return true;
}

function goodRadio(field, msg) {
	for (i=0; i<field.length; i++) {
		if (field[i].checked) return true;
	}
  alert(msg);
  return false;
}

function goodCheck(form, field, msg) {
	var j=0;
	for(i=0; i<form.elements.length; i++) {
		if (form.elements[i].name == field && form.elements[i].checked) return true;
	}
  alert(msg);
  return false;
}

function goodChar(field, msg) {
  return _checkIt(reChar, field, msg);
}

function goodEMail(field, msg) {
  return _checkIt(reEMail, field, msg);
}

function goodInt(field, msg) {
  return _checkIt(reInt, field, msg);
}

function goodSignedInt(field, msg) {
  return _checkIt(reSignedInt, field, msg);
}

function goodFloat(field, msg) {
  return _checkIt(reFloat, field, msg);
}

function goodSignedFloat(field, msg) {
  return _checkIt(reSignedFloat, field, msg);
}

function goodIntLen(n, field, msg) {
  return _checkIt(reNumberN(n,0), field, msg);
}

function goodSignedIntLen(n, field, msg) {
  return _checkIt(reNumberN(n,1), field, msg);
}

function goodIntLen2(n, field, msg) {
  return _checkIt(reNumberN2(n,0), field, msg);
}

function goodSignedIntLen2(n, field, msg) {
  return _checkIt(reNumberN2(n,1), field, msg);
}

function goodCharLen(n, m, field, msg) {
  return _checkIt(reCharNM(n,m), field, msg);
}

function goodFloatLen(n, m, field, msg) {
  return _checkIt(reNumberNM(n,m,0), field, msg);
}

function goodSignedFloatLen(n, m, field, msg) {
  return _checkIt(reNumberNM(n,m,1), field, msg);
}

function goodFloatLen2(n, m, field, msg) {
  return _checkIt(reNumberNM2(n,m,0), field, msg);
}

function goodSignedFloatLen2(n, m, field, msg) {
  return _checkIt(reNumberNM2(n,m,1), field, msg);
}

function _rangeIt(field, r1, r2, msg) {
  if (field.value>=r1 && field.value<=r2) {
    return true;
  }
  else {
    alert(msg);

    field.select();
    field.focus();

    return false;
  }
}

function rangeInt(field, r1, r2, msg) {
  if (goodInt(field, msg)) {
    return _rangeIt(field, r1, r2, msg);
  }

  return false;
}

function rangeSignedInt(field, r1, r2, msg) {
  if (goodSignedInt(field, msg)) {
    return _rangeIt(field, r1, r2, msg);
  }

  return false;
}

function rangeFloat(field, r1, r2, msg) {
  if (goodFloat(field, msg)) {
    return _rangeIt(field, r1, r2, msg);
  }

  return false;
}

function rangeSignedFloat(field, r1, r2, msg) {
  if (goodSignedFloat(field, msg)) {
    return _rangeIt(field, r1, r2, msg);
  }

  return false;
}

function rangeIntLen(n, field, r1, r2, msg) {
  if (goodIntLen(n, field, msg)) {
    return _rangeIt(field, r1, r2, msg);
  }

  return false;
}

function rangeSignedIntLen(n, field, r1, r2, msg) {
  if (goodSignedIntLen(n, field, msg)) {
    return _rangeIt(field, r1, r2, msg);
  }

  return false;
}

function rangeIntLen2(n, field, r1, r2, msg) {
  if (goodIntLen2(n, field, msg)) {
    return _rangeIt(field, r1, r2, msg);
  }

  return false;
}

function rangeSignedIntLen2(n, field, r1, r2, msg) {
  if (goodSignedIntLen2(n, field, msg)) {
    return _rangeIt(field, r1, r2, msg);
  }

  return false;
}

function rangeFloatLen(n, m, field, r1, r2, msg) {
  if (goodFloatLen(n, m, field, msg)) {
    return _rangeIt(field, r1, r2, msg);
  }

  return false;
}

function rangeSignedFloatLen(n, m, field, r1, r2, msg) {
  if (goodSignedFloatLen(n, m, field, msg)) {
    return _rangeIt(field, r1, r2, msg);
  }

  return false;
}

function rangeFloatLen2(n, m, field, r1, r2, msg) {
  if (goodFloatLen2(n, m, field, msg)) {
    return _rangeIt(field, r1, r2, msg);
  }

  return false;
}

function rangeSignedFloatLen2(n, m, field, r1, r2, msg) {
  if (goodSignedFloatLen2(n, m, field, msg)) {
    return _rangeIt(field, r1, r2, msg);
  }

  return false;
}

function _dd(n) {
  return (n<10)?"0"+n:""+n;
}

function _getOffset(n) {
  var d=new Date();
  if (n!=0) {
    d.setTime(d.getTime()+n*86400000);
  }
  return d.getFullYear()+""+_dd(d.getMonth()+1)+""+_dd(d.getDate())+"";
}

function _stringIt(df, d) {
  var y4=df.search(/yyyy/i), m2=df.search(/mm/i), d2=df.search(/dd/i);
  return d.substring(y4, y4+4)+d.substring(m2, m2+2)+d.substring(d2, d2+2);
}

function rangeDate(df, field, r1, r2, msg) {
  if (goodDate(df, field, msg)) {
    var d=_stringIt(df, field.value);

    var r1x="", r2x="";
    if (r1.search(/^\d+$/)!=-1) {
      r1x=_getOffset(r1-0);
    }
    else {
      r1x=_stringIt(df, r1);
    }
    if (r2.search(/^\d+$/)!=-1) {
      r2x=_getOffset(r2-0);
    }
    else {
      r2x=_stringIt(df, r2);
    }

    if (d<r1x || d>r2x) {
      alert(msg);

      field.select();
      field.focus();
    }
    else {
      return true;
    }
  }

  return false;
}

function goodDateRange(df, field1, field2, msg) {
  if (goodDate(df, field1, msg) && goodDate(df, field2, msg)) {
    if (_stringIt(df, field1.value)>_stringIt(df, field2.value)) {
      alert(msg);
      field1.focus();
    }
    else {
      return true;
    }
  }

  return false;
}

function goodDateRange2(df, field1, field2, msg) {
  if (goodDate(df, field1, msg) && goodDate(df, field2, msg)) {
    if (_stringIt(df, field1.value)>=_stringIt(df, field2.value)) {
      alert(msg);
      field1.focus();
    }
    else {
      return true;
    }
  }

  return false;
}



// Copyright c 2001 by Apple Computer, Inc., All Rights Reserved.
//
// You may incorporate this Apple sample code into your own code
// without restriction. This Apple sample code has been provided "AS IS"
// and the responsibility for its operation is yours. You may redistribute
// this code, but you are not permitted to redistribute it as
// "Apple sample code" after having made changes.

// email
function checkEmail (strng) {
  var error="";
  if (strng == "") {
    error = "請輸入電子郵件帳號\n";
  }
  var emailFilter=/^.+@.+\..{2,3}$/;
  if (!(emailFilter.test(strng))) {
    error = "請輸入有效的電子郵件帳號\n";
  } else {
    //test email for illegal characters
    var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/
    if (strng.match(illegalChars)) {
      error = "您輸入的電子郵件帳號包含不合法的字元\n";
    }
  }
  if (error) {
    alert(error);
    return false;
  } else {
    return true;
  }
}


// phone number - strip out delimiters and check for 10 digits

function checkPhone (strng) {
var error = "";
if (strng == "") {
   error = "You didn't enter a phone number.\n";
}

var stripped = strng.replace(/[\(\)\.\-\ ]/g, ''); //strip out acceptable non-numeric characters
    if (isNaN(parseInt(stripped))) {
       error = "The phone number contains illegal characters.";

    }
    if (!(stripped.length == 10)) {
	error = "The phone number is the wrong length. Make sure you included an area code.\n";
    }
return error;
}


// password - between 6-8 chars, uppercase, lowercase, and numeral

function checkPassword (strng, strng2) {
if (!strng.value) {
			 alert('請輸入新密碼');
			 strng.focus();
			 return false;
}

    var illegalChars = /[\W_]/; // allow only letters and numbers

    if ((strng.value.length < 6) || (strng.value.length > 8)) {
       //error = "The password is the wrong length.\n";
			 alert('密碼長度必需介於6-8個字元');
			 strng.focus();
			 return false;
    }
    else if (illegalChars.test(strng.value)) {
      //error = "The password contains illegal characters.\n";
			alert('密碼必需是字母跟數字組成');
			strng.focus();
			return false;
    }
    else if (strng.value != strng2.value) {
			alert('新密碼與確認密碼不符');
			strng2.focus();
			return false;
    }
    //else if (!((strng.search(/(a-z)+/)) && (strng.search(/(A-Z)+/)) && (strng.search(/(0-9)+/)))) {
    //   error = "The password must contain at least one uppercase letter, one lowercase letter, and one numeral.\n";
    //}
return true;
}


// username - 4-10 chars, uc, lc, and underscore only.

function checkUsername (strng) {
  var error = "";
  if (strng == "") {
     error = "You didn't enter a username.\n";
  }

  var illegalChars = /\W/; // allow letters, numbers, and underscores
  if ((strng.length < 4) || (strng.length > 10)) {
    error = "The username is the wrong length.\n";
  } else if (illegalChars.test(strng)) {
    error = "The username contains illegal characters.\n";
  }
  return error;
}


// non-empty textbox
function isEmpty(strng) {
  var error = "";
  if (strng.length == 0) {
     error = "The mandatory text area has not been filled in.\n"
  }
  return error;
}

// was textbox altered

function isDifferent(strng) {
var error = "";
  if (strng != "Can\'t touch this!") {
     error = "You altered the inviolate text area.\n";
  }
return error;
}

// exactly one radio button is chosen

function checkRadio(checkvalue) {
var error = "";
   if (!(checkvalue)) {
       error = "Please check a radio button.\n";
    }
return error;
}

// valid selector from dropdown list

function checkDropdown(choice) {
var error = "";
    if (choice == 0) {
    error = "You didn't choose an option from the drop-down list.\n";
    }
return error;
}