//------------------------------------------------------------------------------------------------//
// CONTACT US FUNCTIONS SECTION                                                                   //
//------------------------------------------------------------------------------------------------//
var subjectlist;

//-----------------------------------------------//
// This function add a subject to subjects list. //
//-----------------------------------------------//
function AddSubject(subject, subsubject)
{
          var index;
          var subjectfound = false;
          var currentsubject;
         
          if (!subjectlist)
          {
                    // Initialize subject Array;
                     subjectlist = new Array();
          }

          // Search the subject in subjects Array
          for (index = 0; (index < subjectlist.length) && !subjectfound; index++)
          {
                    currentsubject = subjectlist[index];
                   
                    // Test if subject and current subject are defined
                    if (subject && currentsubject)
                    {
                              if (subject.code == currentsubject.code)
                              {
                                        subjectfound = true;
                              }
                    }
          }

          if (!subjectfound)
          {
                    // Add the subject to subjects Array
                    subjectlist.push(subject);
                    currentsubject = subject;
          }

          // Add the subsubject to the subject
          AddSubSubject(currentsubject, subsubject);
}

//---------------------------------------------//
// This function add a subsubject to a subject //
//---------------------------------------------//
function AddSubSubject(subject, subsubject)
{
          // Test if subject and subsubject are defined
          if (subject && subsubject)
          {
                    if (!subject.subsubjects)
                    {
                              subject.subsubjects = new Array();
                    }
                   
                    // Add subsubject
                    subject.subsubjects.push(subsubject);
          }
}

//---------------------------------------------//
// This function fills a select with subjects. //
//---------------------------------------------//
function FillSubject(optionselect,optionhidden)
{
          var index;
          var optionitem;
          var subjectselect = GetElement("mail_subject_list", 0);
          //alert(subjectselect);
          var subjecthidden = GetElement("mail_subject", 0);
          //alert(subjecthidden);
         
          if (subjectselect && subjectlist)
          {
                    // Reset subjects
                    ResetSelect(subjectselect);
                   
                    for (index = 0; index < subjectlist.length; index++)
                    {
                              // Add option item
                              optionitem = document.createElement("OPTION");
                              optionitem.text = subjectlist[index].text;
                              optionitem.value = subjectlist[index].code;
                              subjectselect.options[subjectselect.options.length] = optionitem;
                             
                              if (subjecthidden)
                              {
                                        // Select the current value
                                        optionitem.selected = (optionitem.value == subjecthidden.value);
                              }
                    }
                   
                    if (optionselect)
                    {
                              var mail_subject_list = GetElement("mail_subject_list", 0);
                             
                              mail_subject_list_index = mail_subject_list.selectedIndex;
                              mail_subject_list.selectedIndex = optionselect;
                    }
                   
                    if (optionhidden)
                    {
                              var mail_subject_list = GetElement("mail_subject_list", 0);
                              MM_showHideLayers("mail_subject_list","","hide");
                    }
          }
}

//------------------------------------------------//
// This function fills a select with subsubjects. //
//------------------------------------------------//
function FillSubSubject()
{
          var optionitem;
          var index;
          var subjectselect = GetElement("mail_subject_list", 0);
          var subsubjectselect = GetElement("mail_subsubject_list", 0);
          var subsubjecthidden = GetElement("mail_subsubject", 0);

          if (subjectselect && subsubjectselect)
          {
                    // Reset subsubjects                                                 
                    ResetSelect(subsubjectselect);
                   
                    currentsubject = subjectlist[subjectselect.options.selectedIndex - 1];
                   
                    if (currentsubject && currentsubject.subsubjects)
                    {                   
                              for (index = 0; index < currentsubject.subsubjects.length; index++)
                              {
                                        // Add option item
                                        optionitem = document.createElement("OPTION");
                                        optionitem.text = currentsubject.subsubjects[index].text;
                                        optionitem.value = currentsubject.subsubjects[index].code;
                                        subsubjectselect.options[subsubjectselect.options.length] = optionitem;
                                       
                                        if (subsubjecthidden)
                                        {
                                                  // Select the current value
                                                  optionitem.selected = (optionitem.value == subsubjecthidden.value);
                                        }
                              }
                    }
          }
}

//------------------------------------------------//
// This function resets a select.                 //
//------------------------------------------------//
function ResetSelect(selectlist)
{
          // Remove options
          while (selectlist.options.length != 1)
          {
                    selectlist.options[1] = null;
          }
}

//------------------------------------------------//
// This function gets a value from a list using   //
// its index and return the default value if      //
// index is out of range or list is null.         //
//------------------------------------------------//
function GetListValue(list, index, defaultvalue)
{
          if (list && list[index])
          {
                    return list[index];
          }
          else
          {
                    return defaultvalue;
          }
}         

//------------------------------------------------//
// This function sets mailto and subject values   //
// to hidden fields. It also rebuild subsubjects  //
// list.                                          //
//------------------------------------------------//
function OnSubjectListChange()
{
          var subjectselect = GetElement("mail_subject_list", 0);
          var subject = GetListValue(subjectlist, subjectselect.selectedIndex - 1, null);
         
          if (subject)
          {
                    SaveElement('mail_subject', subject.text);
                    SaveElement('mail_subject_code', subject.code);
                    SaveElement('mail_to', subject.emailto);
          }
          else
          {
                    SaveElement('mail_subject', '');
                    SaveElement('mail_subject_code', '');
                    SaveElement('mail_to', '');
          }
         
          if(GetElement("mail_subsubject_list", 0))
          {
                    FillSubSubject();
          }
}

//------------------------------------------------//
// This function sets mailto and subject values   //
// to hidden fields. It also rebuild subsubjects  //
// list.                                          //
//------------------------------------------------//
function OnSubSubjectListChange()
{
          var subjectselect;
          var subsubjectselect;
          var subject;
          var subsubject;
         
          subjectselect = GetElement("mail_subject_list", 0);
          subsubjectselect = GetElement("mail_subsubject_list", 0);
          subject = GetListValue(subjectlist, subjectselect.selectedIndex - 1, null);
         
          if (subject)
          {
                    subsubject = GetListValue(subject.subsubjects, subsubjectselect.selectedIndex - 1, null);
                   
                    if (subsubject)
                    {
                              SaveElement('mail_subsubject', subsubject.text);
                              SaveElement('mail_subsubject_code', subsubject.code);
                    }
                    else
                    {
                              SaveElement('mail_subsubject', '');
                              SaveElement('mail_subsubject_code', '');
                    }
          }
}