//Validation
function ifYesShowInputField(yes_no_select_box_id, tag_id){
	
	var yes_answered = document.getElementById(yes_no_select_box_id).value;
	if(yes_answered=="1"){
		showHideTag(tag_id, true);		
	}else{
		showHideTag(tag_id, false);
	}
}

function ifYesValidateField(yes_no_select_box_id, field_for_validation_id, msg_element_id){
	var yes_answered = document.getElementById(yes_no_select_box_id).value;
	if(yes_answered=="1"){
		return validateField(field_for_validation_id, msg_element_id);
	}else{
		showHideTag(msg_element_id, false);
		return true;
	}
}


function validateField(field_id, msg_box_id){
	var validated = false;
	var first_value = document.getElementById(field_id).value;
	if(first_value.length == 0){
		showHideTag(msg_box_id, true);
		focusOnElement(field_id);
		validated = false;
	}else{
		showHideTag(msg_box_id, false);
		validated = true;
	}	
	return validated;
}

function validateEmailField(field_id, msg_box_id){
    var validated = false;
    var fieldValidated = validateField(field_id, msg_box_id);
    if(fieldValidated){
        var validRegExp = /^.+@.+\..+$/;
        var strEmail = document.getElementById(field_id).value;
        if (strEmail.search(validRegExp) == -1){
		    showHideTag(msg_box_id, true);
		    focusOnElement(field_id);
		    validated = false;
        }else{
		    showHideTag(msg_box_id, false);
		    validated = true;
        }
   }
   return validated;
}

//Date validation helper scripts
var dtCh= "/";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(0,pos1)
	var strDay=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		alert("The date format should be : mm/dd/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
return true
}
//END - Date validation helper scripts

function validateBirthday(field_id, msg_box_id){
	var validated = false;
	var first_value = document.getElementById(field_id).value;
	if(first_value.length == 0){
		showHideTag(msg_box_id, true);
		focusOnElement(field_id);
		validated = false;
	}else{
		var valid_date = isDate(first_value);
		if(valid_date){
			showHideTag(msg_box_id, false);
			validated = true;		
		}else{
			showHideTag(msg_box_id, true);
			focusOnElement(field_id);
			validated = false;		
		}	
	}
	return validated;
}


function is_checkbox_checked(id){
	var checked = false;
	var checkbox = document.getElementById(id);
	if(checkbox){		
		if(checkbox.checked){
			checked = true;
		}	
	}
	return checked;
}

function validate_working_hours(){
	
	if(
	is_checkbox_checked("sun") ||
	is_checkbox_checked("mon") ||
	is_checkbox_checked("tue") ||
	is_checkbox_checked("wed") ||
	is_checkbox_checked("thu") ||
	is_checkbox_checked("fri") ||
    is_checkbox_checked("sat")
    ){
    	return true;
    }else{    
    	showHideTag("msg_enter_working_days", true);	
    	focusOnElement("sun");
    	return false;
    }
}


function hideAllMessages(){
	showHideTag("msg_enter_first_name", false);
	showHideTag("msg_enter_last_name", false);
	showHideTag("msg_enter_email", false);
//	showHideTag("msg_enter_phone", false);
	showHideTag("msg_enter_place_of_work", false);
	showHideTag("msg_enter_work_address", false);
	showHideTag("msg_enter_work_phone_number", false);
	showHideTag("msg_enter_university_name", false);
	showHideTag("msg_enter_date_of_graduation", false);
	showHideTag("msg_enter_degree_diploma_certification", false);
	showHideTag("msg_enter_age_of_medical_practice", false);
	showHideTag("msg_enter_licence_state", false);
	showHideTag("msg_enter_cert_reg_number", false);
	showHideTag("msg_forums_list", false);	
	showHideTag("msg_enter_medical_speciality", false);
	showHideTag("msg_enter_cv", false);
	showHideTag("msg_enter_formal_qualification_doc", false);	
	showHideTag("msg_enter_picture", false);		
	showHideTag("msg_enter_working_days", false);	
}

function validateFields(){	
   hideAllMessages();

   
   
   if(!validateField("edb_first_name", "msg_enter_first_name")) return false;
   if(!validateField("edb_last_name", "msg_enter_last_name")) return false;
   if(!validateEmailField("edb_email", "msg_enter_email")) return false;   
//   if(!validateField("edb_phone", "msg_enter_phone")) return false;
   if(!validateField("edb_place_of_work", "msg_enter_place_of_work")) return false;   
   if(!validateField("edb_work_address", "msg_enter_work_address")) return false; 
   if(!validateField("edb_work_phone_number", "msg_enter_work_phone_number")) return false;   
   if(!validate_working_hours()) return false;
   if(!validateField("edb_university_name", "msg_enter_university_name")) return false;   
   if(!validateBirthday("edb_date_of_graduation", "msg_enter_date_of_graduation")) return false;   
   if(!validateField("edb_degree_diploma_certification", "msg_enter_degree_diploma_certification")) return false;   
   if(!validateField("edb_age_of_medical_practice", "msg_enter_age_of_medical_practice")) return false;   
   if(!validateField("edb_licence_state", "msg_enter_licence_state")) return false;   
   if(!validateField("edb_cert_reg_number", "msg_enter_cert_reg_number")) return false;   
   if(
	   !ifYesValidateField(
		   "edb_cert_or_spec_training", 
		   "edb_medical_speciality", 
		   "msg_enter_medical_speciality")
   ) return false;

   if(!validate_forums_list()) return false;
   
//   if(!validateField("edb_medical_speciality", "msg_enter_medical_speciality")) return false;   
   
//   if(!validateField("file_picture", "msg_enter_picture")) return false;      
//   if(!validateField("file_cv", "msg_enter_cv")) return false;   
//   if(!validateField("file_formal_qualification_doc", "msg_enter_formal_qualification_doc")) return false;   

   
   if(!is_checkbox_checked('agree_to_terms')) {
	   showHideTag('msg_agree_to_terms', true);
	   return false;
   } 

   
   
   document.getElementById("saved").value = "saved";
   return true;
}

function focusOnElement(element_id){
	document.getElementById(element_id).focus();
}

function showHideTag(field_id, show){
	if(show){
		document.getElementById(field_id).style.display = "";
	}else{
		document.getElementById(field_id).style.display = "none";
	}
}

function validate_forums_list(){
    var any_forum_checked_obj = document.getElementById('chbx_any_forum');
    if(any_forum_checked_obj){
        if(any_forum_checked_obj.checked){
            return true;
        }else{
            var select_obj = document.getElementById('slct_selected_forums');
            if(select_obj){
                var number_of_forums_selected = select_obj.length;
                if(number_of_forums_selected==0){
                    showHideTag('msg_forums_list', true);
                    focusOnElement('slct_selected_forums');
                    return false;
                }else{
                    showHideTag('msg_forums_list', false);
                    create_selected_forums_list();
                    return true;
                }
            }
        }
    }
}

//End Validation




//Select forum 

              function add(from_slct_id, to_slct_id){
                  var option_exists = check_if_option_already_added(from_slct_id, to_slct_id);
                  if(option_exists){
                      hide_warning_message_box();
                      var from_select_obj = document.getElementById(from_slct_id);
                      if(from_select_obj){
                          var fromSelIndex = from_select_obj.selectedIndex;
                          if(fromSelIndex >= 0){
                              var to_select_obj = document.getElementById(to_slct_id);
                              if(to_select_obj){
                                  var toLength = to_select_obj.options.length;
                                  
                                  var option = from_select_obj.options[fromSelIndex];
                                  
                                  var selected_option_value = option.value;
                                  var selected_option_caption = option.text;
                                  
                                  to_select_obj.options[toLength] = new Option(selected_option_caption, selected_option_value);
                              }
                          }else{
                              show_warning_message('Please select a forum!');   
                          }
                      }
                  }else{                        
                      show_warning_message('This forum is already added to the list!');
                  }                    
                  create_selected_forums_list();
              }
              
              function show_warning_message(message){                    
                  var obj = document.getElementById('msg_box');
                  if(obj){
                      obj.style.display="";
                      obj.innerHTML = message;
                  }
              }

              function hide_warning_message_box(){
                  var obj = document.getElementById('msg_box');
                  if(obj){                        
                      obj.style.display="none";
                  }
              }
              
              function check_if_option_already_added(from_slct_id, to_slct_id){
                  var from_select_obj = document.getElementById(from_slct_id);
                  if(from_select_obj){
                      var selIndex = from_select_obj.selectedIndex;
                      if(selIndex >= 0){                            
                          var to_select_obj = document.getElementById(to_slct_id);
                          if(to_select_obj){
                              var toLength = to_select_obj.options.length;                                
                              if(toLength == 0){
                                  return true;
                              }                                
                              var from_value = from_select_obj.options[selIndex].value;
                              for(j=0; j<toLength; j++){                                    
                                  var to_value = to_select_obj.options[j].value;                                    
                                  if(from_value == to_value){
                                      return false;
                                  }
                              }
                          }else{
                              return false;
                          }
                      }
                  }else{
                      return false;
                  }
                  return true;
              }

            
              function remove(from_slct_id){
                  var select_obj = document.getElementById(from_slct_id);
                  if(select_obj){
                      hide_warning_message_box();
                      var selIndex = select_obj.selectedIndex;
                      if(selIndex >= 0){
                          select_obj.options[selIndex] = null;
                      }else{
                          show_warning_message('Please select a forum to remove!');
                      }
                      create_selected_forums_list();
                  }
              }
              
              function remove_all(select_box_id){
                  var select_obj = document.getElementById(select_box_id);
                  if(select_obj){
                      select_obj.options.length = 0;
                  }
                  create_selected_forums_list();
              }
              
              function enable_disable_forum_selection(){
                  var any_forum_chbx_obj = document.getElementById('chbx_any_forum');
                  if(any_forum_chbx_obj){
                      var checked = any_forum_chbx_obj.checked;
                      if(checked){
                          disable_object('slct_all_forums', true);
                          
                          disable_object('add_all_options', true);
                          disable_object('add_option', true);
                          disable_object('remove_option', true);
                          disable_object('remove_all_options', true);
                          
                          disable_object('slct_selected_forums', true);
                      }else{
                          disable_object('slct_all_forums', false);
                          
                          disable_object('add_all_options', false);
                          disable_object('add_option', false);
                          disable_object('remove_option', false);
                          disable_object('remove_all_options', false);
                          
                          disable_object('slct_selected_forums', false);
                      }
                  }
              }
              
              function disable_object(object_id, value){
                  var obj = document.getElementById(object_id);
                  if(obj){
                     obj.disabled = value;
                  }
              }
              
              function create_selected_forums_list(){
                  var to_select_obj = document.getElementById('slct_selected_forums');                    
                  var forums_list = "";
                  if(to_select_obj){
                      var toLength = to_select_obj.options.length;
                      for(j=0; j<toLength; j++){
                          var to_value = to_select_obj.options[j].value;
                          forums_list += to_value + ", ";
                      }
                      
                      if(forums_list.length>2){
                          forums_list = forums_list.substring(0, forums_list.length-2);                            
                      }                                                
                  }                    
                  document.getElementById('hf_list_of_selected_forums').value = forums_list;
              }


//End select forum