// This variable defines if in an error or non error case the text is set/deleted
var setErrorText = true;		
/*
========================================================= 
PURPOSE 
This page contains all functions needed for Javascript based field validation
SPECIAL NOTES 
HISTORY 
Who				When		What
MIG-FIEW-K. Nies		28.11.2007	Initial version
EnTeCo-M. Bierl			11.12.2007	Added seperate field description
========================================================= 
*/
function validateFields(currDoc, mDoc, fieldList) {
/*
========================================================= 
PURPOSE 
This function does field validation
PASSED 
currDoc		document object
mDoc		form object with fields to validate
fieldList		array of field objects, contains
				"fieldName~checkType~fieldDescription"
				checkType can be
				"empty" - checks for empty fields
				"numeric" - checks for valid numbers
				"numericnotnull" - checks for numeric and not 0
				"date" - checks for valid date
				"email" - checks for valid email address
				
RETURNS 
True, False
SPECIAL NOTES 
Uses function  isDateCorrect(dateString) for validation of dates
HISTORY 
Who				When		What
MIG-FIEW-K. Nies		28.11.2007	Initial version
========================================================= 
*/
	var result = true;
	for (var i = 0; i < fieldList.length; i++) {
		var checkField = fieldList[i].value;
		var checkArray = checkField.split('~');
		var objectField = mDoc.elements[checkArray[0]];
		var error = '';
		var fieldType = '';
		var fieldValue = new Array();
		if (typeof(objectField.type) == 'string') {
			fieldType = objectField.type;
		}
		else {
			fieldType = objectField[0].type;
		}
		switch (fieldType) {
			case "select-one":				
				if (objectField.selectedIndex == -1) {
					fieldValue.push('');
				}
				else {
					fieldValue.push(objectField.options[objectField.selectedIndex].value);
				}
				break;
			case "select-multiple":				
				for (var j = 0; j < objectField.options.length; j++) {
					if (objectField.options[j].selected == true) {
						fieldValue.push(objectField.options[j].value);
					}
				} // end for			
				break;
			case "radio":
				for (var j = 0; j < objectField.length; j++) {
					if (objectField[j].checked == true) {
						fieldValue.push(objectField[j].value);
						break;
					}
				} //end for
				break;
			case "checkbox":
				if (objectField.length) {
					for (var j = 0; j < objectField.length; j++) {
						if (objectField[j].checked == true) {
							fieldValue.push(objectField[j].value);
						}
					} // end for
				}
				else {
					if (objectField.checked == true) {
						fieldValue.push(objectField.value);
					}
				}
				break;
			default:
				fieldValue.push(objectField.value);
				break;
		}
		if ((fieldValue.length == 0) && (checkArray[1] == "empty")) {
			error = getErrorMessage(checkArray[2], checkArray[1]);
//			error = checkArray[2] + ' is empty. Please enter a value';
		}
		else {
			for (var k = 0; k < fieldValue.length; k++) {
				switch(checkArray[1]) {
					case "empty":
						if (fieldValue[k] == '') {			
							error = getErrorMessage(checkArray[2], checkArray[1]);
						}
						break;
					case "numeric":
						if (isNaN(fieldValue[k])) {
							error = getErrorMessage(checkArray[2], checkArray[1]);
						}				  
						break;
					case "numericnotnull":
						if (isNaN(fieldValue[k])) {
							error = getErrorMessage(checkArray[2], checkArray[1]);
						}
						else {
							if (fieldValue[k] == 0) {
								error = getErrorMessage(checkArray[2], checkArray[1]);
							}
						}				  
						break;				
					case "date":
						if (!isDateCorrect(fieldValue[k])) {
							error = getErrorMessage(checkArray[2], checkArray[1]);
						}
						break;				
					case "email":
						if (!isValidEMail(fieldValue[k])) {
						
							error = getErrorMessage(checkArray[2], checkArray[1]);
						}
						break;				
					default:
						if (function_exists('specialValidation')) {
							if (!specialValidation(checkArray[0], fieldValue[k], checkArray[1], checkArray[2])) {
								error = getErrorMessage(checkArray[2], checkArray[1]);
							}
						}
						break;
				}	
			} //end for
		} //end if
		if (error == '') {
			with (currDoc.getElementById(checkArray[0] + 'Err')) {
				if (setErrorText == true) {
					firstChild.nodeValue = error;
				}
				className = "errortexthidden";
/*				style.visibility = "hidden";
				style.position = "absolute";*/
			}
			result = result && true;
		}
		else {
			with (currDoc.getElementById(checkArray[0] + 'Err')) {
				if (setErrorText == true) {
					firstChild.nodeValue = error;
				}
				className = "errortextvisible";					
/*				style.visibility = "visible";
				style.position = "relative";*/
			}
			result = false;
		}
	} // end for
	return result;
} //end function
function isDateCorrect(str_Date) {
/*
========================================================= 
PURPOSE 
This function checks for correct date format
PASSED 
String with date-value to check
RETURNS 
True, False
SPECIAL NOTES 
Currently only checks for German date format
HISTORY 
Who				When			What
EnTeCo Consulting-Mathias Bierl	28.11.2007	Initial version
MIG-FIEW-K. Nies		28.11.2007	Checks for empty string,												returns true if checkstring												is empty
========================================================= 
*/
      var s_Day;
      var s_Month;
      var s_Year;
	// Check if str_Date is empty
	if (str_Date == '') {
		return true;
	}	
      // First try to get a german date
      var a_Date = str_Date.split('.');
      // If we have just one element then it was not a german date or no date
      if (a_Date.length == 1) {
            return false;
      }
      // Otherwise we have a german date, so save the values
      else {
            if (a_Date.length != 3) {
                  return false;
            }
            s_Day = a_Date[0];
            s_Month = a_Date[1];
            s_Year = a_Date[2];
      }
      // Now check if we only have numbers
      for (i = 0;i<3;i++) {
            var n_Temp = Number(a_Date[i]);
            if (isNaN(n_Temp)) {
                  return false;
            }
      }
      // And last check if the range is ok
      // First the month and the year
      var n_Month = Number(s_Month);
      if ((n_Month < 1) || (n_Month > 12)) {
            return false;
      }
      // And the year
      var n_Year = Number(s_Year);
      // If the user enters a value lower than hundred we have to add the century
      if (n_Year < 100) {
            if (n_Year < 70) {
                  n_Year = n_Year + 2000;
            }
            else {
                  n_Year = n_Year + 1900;
            }
      }
      //if ((n_Year < 1970) || (n_Year > 2069)) {
      //      return false;
      //}
      // And last the days because there are some specialties
      var n_Day = Number(s_Day);
      if ((n_Day < 1) || (n_Day > 31)) {
            return false;
      }
      // Depending on the month check the count of days
      switch (n_Month) {
            case 4,6,9,11 :
                  if (n_Day > 30) {
                        return false;
                  }
            break;
            case 2 :
                  if ((n_Year % 4) == 0) {
                        if (n_Day > 29) {
                              return false;
                        }
                  }
                  else {
                        if (n_Day > 28) {
                              return false;
                        }
                  }
            break;
      }
      return true;
}
function getErrorMessage(str_FieldName, str_Error) {
/*
========================================================= 
PURPOSE 
This function returns the needed error message for the given error and field
If no application specific function is defined an default value will be returned
PASSED 
String with with field name
String with error name
RETURNS 
String
SPECIAL NOTES 
HISTORY 
Who				When			What
EnTeCo Consulting-Mathias Bierl	17.01.2008	Initial version
========================================================= 
*/
	if (function_exists('getErrorMessageApp')) {
		return getErrorMessageApp(str_FieldName, str_Error);
	}
	else {
		switch(str_Error) {
			case "empty":
				error = str_FieldName + ' is empty. Please enter a value';
				break;
			case "numeric":
				error = str_FieldName + ' is not numeric. Please enter a valid number';
				break;
			case "numericnotnull":
				error = str_FieldName + ' is not a valid value. Please enter a valid number';
				break;				
			case "date":
				error = str_FieldName + ' is not a valid date !';
				break;				
			case "email":
				error = str_FieldName + ' is not a valid e-mail-address !';
				break;				
			default:
				error = str_FieldName + ' has not passed validation !';	
				break;
		}
		return error;	
	}
}
function function_exists(fName, pObj) {
/*
========================================================= 
PURPOSE 
This function checks if the given function exists
PASSED 
String, function name
Object, where to search for the function
RETURNS 
true, false
SPECIAL NOTES 
HISTORY 
Who				When			What
EnTeCo Consulting-Mathias Bierl	17.01.2008	Initial version
========================================================= 
*/
if(!pObj) pObj = window;
return (typeof pObj[fName] == 'function') ? true : false;
}
function isValidEMail(s)
{
 var a = false;
 var res = false;
 if(typeof(RegExp) == 'function')
 {
  var b = new RegExp('abc');
  if(b.test('abc') == true){a = true;}
  }

 if(a == true)
 {
  reg = new RegExp('^([a-zA-Z0-9\\-\\.\\_]+)'+
                   '(\\@)([a-zA-Z0-9\\-\\.]+)'+
                   '(\\.)([a-zA-Z]{2,4})$');
  res = (reg.test(s));
 }
 else
 {
  res = (s.search('@') >= 1 &&
         s.lastIndexOf('.') > s.search('@') &&
         s.lastIndexOf('.') >= s.length-5)
 }
 return(res);
}