/*
Checking function :
isEmail 			--		invalid email
R 					-- 		cannot be empty
S					--		Please choose one of the XXX
isTel				--		XXX is not valid
isNotOnlyNum		--		XXX	must not be a numbers only
isNumLen			--		XXX must be 1 -- 9 digits.
isMaxLen			--		XXX is maximum 8 characters.
isLen				--		XXX must be 6 characters.
!=R					--		XXX must be a number.
inRange				--		must contain a number between 1 and 9.
notMatch		--	compare with 3rd input parameter, is not match
Match                 --          compare with 3rd input parameter, is match
*/

function trim(s) {
    if (s == null) {
      s = '';
    } else {
      while (s.substring(0,1) == ' ')
          s = s.substring(1, s.length);
      while (s.substring(s.length-1,s.length) == ' ')
          s = s.substring(0, s.length-1);
    }
    return s;
}

function MM_findObj(n, d) { //v4.0
  var p,i,x;
  if(!d) d=document;
  if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document;
    n=n.substring(0,p);
  }
  if(!(x=d[n])&&d.all)
    x=d.all[n];
  for (i=0;!x&&i<d.forms.length;i++)
    x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++)
    x=MM_findObj(n,d.layers[i].document);
  if(!x && document.getElementById)
    x=document.getElementById(n);
  return x;
}

function MM_validateForm() { //v4.0
  var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
  var extraparm;

  for (i=0; i<(args.length-3); i+=4) {
    test=args[i+3];
    testName = args[i];
    Rval=MM_findObj(args[i+2]);
    val=MM_findObj(testName);

    if (val) {
      nm=args[i+1];

      if (test.charAt(0) == 'C') {
        // Check if value is checked for checkbox
        var ifChecked = false;
        var j = 0;

        while (j < val.length && !ifChecked) {
          if (val[j].checked)
            ifChecked = true;
          j++;
        }
        if (!ifChecked)
          errors += '- Please choose one of the ' + nm + '.\n';
      } else if (test.charAt(0) == 'S') {
        // Check if value is selected for select box
        if (!isObjSelected(val))
          errors += '- Please choose one of the ' + nm + '.\n';
      } else if ((val=trim(val.value))!="") {
        if (test.indexOf('isCharOrSp')!=-1) {
          var found = false;
          var k = 0;
          for (k = 0; k < val.length && !found; k++) {
            var c = val.charAt(k);
            if (!isLetter(c) && c != ' ') {
              errors += '- ' + nm + ' can only contain letters.\n';
              found = true;
            }
          }
        } else if (test.indexOf('isAlphaNumericHyphen') != -1) {
		  validstr = /[^a-zA-Z0-9-]/g;
	      if ( validstr.test(val) )
	        errors += '- ' + nm + ' can only contain letter, numbers and hypen.\n';
        } else if (test.indexOf('isAlphaNumeric')!=-1) {
		  validstr = /[^a-zA-Z0-9]/g;
	      if ( validstr.test(val) )
            errors += '- ' + nm + ' must only contain letters or digits.\n';
        } else if (test.indexOf('isHexadecimal')!=-1) {
		  validstr = /[^a-fA-F0-9]/g;
	      if ( validstr.test(val) )
            errors += '- ' + nm + ' must be hexadecimal.\n';
        } else if (test.indexOf('isNoSpChar')!=-1) {
          var found = false;
          var k = 0;
          for (k = 0; k < val.length && !found; k++) {
            var c = val.charAt(k);
            if (!isLetter(c)) {
              errors += '- ' + nm + ' can only contain letters (no space).\n';
              found = true;
            }
          }
        } else if (test.indexOf('isCharOrDgt')!=-1) {
          var found = false;
          for (var k = 0; k < val.length && !found; k++) {
            var c = val.charAt(k);
            if (!(isLetter(c)||isDigit(c))) {
              errors += '- ' + nm + ' can only contain letters or digits(no space).\n';
              found = true;
            }
          }
        } else if (test.indexOf('isValid')!=-1) {
          var found = false;
          for (var k = 0; k < val.length && !found; k++) {
            var c = val.charAt(k);
            if (!isValidChar(c) && c != ' ') {
              errors += '- ' + nm + ' contain invalid character(s).\n';
              found = true;
            }
          }
        } else if (test.indexOf('isEmail')!=-1) {
          // no checking for email format
        } else if (test.indexOf('isTel')!=-1) {
          if (!isPhone(val))
            errors += '- ' + nm + ' is not valid.\n';
        } else if (test.indexOf('isOnlyNum') != -1) {
          if (!isAllDigits(val))
            errors += '- ' + nm + ' must be digit only.\n';
        } else if (test.indexOf('isNotOnlyNum') != -1) {
          if (isAllDigits(val))
            errors += '- ' + nm + ' must not be a number only.\n';
        } else if (test.indexOf('isNumLen') != -1) {
          if (!isAllDigits(val) || val.length != test.substring(test.indexOf('isNumLen')+8))
            errors += '- ' + nm + ' must be '+test.substring(9)+' digits.\n';
        } else if (test.indexOf('isMinLen') != -1) {
          if (val.length < test.substring(test.indexOf('isMinLen')+8))
            errors += '- ' + nm + ' is minimum '+test.substring(test.indexOf('isMinLen')+8)+' characters.\n';
        } else if (test.indexOf('isMaxLen') != -1) {
          if (val.length > test.substring(test.indexOf('isMaxLen')+8))
            errors += '- ' + nm + ' is maximum '+test.substring(test.indexOf('isMaxLen')+8)+' characters.\n';
        } else if (test.indexOf('isLen') != -1) {
          if (val.length != test.substring(test.indexOf('isLen')+5))
            errors += '- ' + nm + ' must be '+test.substring(test.indexOf('isLen')+5)+' characters.\n';
        } else if (test.indexOf('notMatch')!=-1) {
          if (isObjMatched(val, Rval))
            errors += '- '+nm+' must not be the same.\n';
        } else if (test.indexOf('Match')!=-1) {
           if (!isObjMatched(val, Rval))
            errors += '- '+nm+' must be matched.\n';
        } else if (test!='R') {
          if (isNaN(val))
            errors+='- '+nm+' must be a number.\n';
          if (test.indexOf('inRange') != -1) {
            p=test.indexOf(':');
            min=test.substring(test.indexOf('inRange')+7,p);
            max=test.substring(p+1);
            if (val<min || max<val)
              errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
          } // end if (test.indexOf('inRange') != -1
        }
      } else if (test.charAt(0) == 'R')
        errors += '- '+nm+' is mandatory.\n';
    } // end if (val)
  } // end for

  if (errors)
    alert('The following error(s) occurred:\n---------------------------------------------\n'+errors);
  document.MM_returnValue = (errors == '');
  return (errors == '');
}

function isAlphaNumeric (s) {
    for (var i = 0; i < s.length; i++) {
      var c = s.charAt(i);
      if (!(isDigit(c) || isLetter(c)))
        return false;
    }
    return true;
}

function isObjSelected(obj) {
  return (obj.options[obj.selectedIndex].value != '');
}

function isObjChecked(obj) {
  return (obj[obj.selectedIndex].checked);
}

function isObjMatched(obj, obj2) {
	return (obj==obj2.value);
}

function isAllDigits (s) {
  for (var i = 0; i < s.length; i++) {
	  var c = s.charAt(i);
	  if (!isDigit(c))
		  return false;
  }
  return true;
}

function isPhone (s) {
  for (var i = 0; i < s.length; i++) {
	  var c = s.charAt(i);
	  if (!isPhoneDigit(c))
		  return false;
  }
  return true;
}

function isPhoneDigit (c) {
   return ((c >= "0") && (c <= "9") || (c == "-") || (c == " ") || (c == "(") || (c == ")"));
}


function isLetter (c) {
   return ( ((c >= "a") && (c <= "z")) || ((c >= "A") && (c <= "Z")) );
}

function isDigit (c) {
   return ((c >= "0") && (c <= "9"));
}

function isValidChar (c) {
    return ((c!="?")&&(c!=";")&&(c!="%")&&(c!="&")&&(c!="\\")&&(c!="/")&&(c!="!")&&(c!="<")&&(c!=">"));
}