// chkToggle ( [ OBJECT tg_form, STRING elemName ] )
// chkToggle ( self.document.frmMailList, 'chkMsgID')
function chkBoxToggle()
  {
   if ( chkBoxToggle.arguments.length >= 1 )
      { var tg_form = chkBoxToggle.arguments[0]; }
   else
      { var tg_form = document.forms[0]; }

   for ( var i=0; i<tg_form.elements.length; i++ )
       {
        var elem = tg_form.elements[i];
        if ( elem.type != "checkbox" ) { continue; }
        if ( chkBoxToggle.arguments.length >= 2 )
           {
            var elemName = chkBoxToggle.arguments[1];
            if ( elem.name == elemName )
               {
                if ( elem.checked ) { elem.checked = false; }
                else { elem.checked = true; }
               }
           }
        else
           {
            if ( elem.checked ) { elem.checked = false; }
            else { elem.checked = true; }
           }
       }
  }



// chkBoxAll ( BOOLEAN chk [, OBJECT tg_form, STRING elemName ] )
// chkBoxAll( true, self.document.frmMailList, 'chkMsgID')
function chkBoxAll ( chk )
  {
   if ( chkBoxAll.arguments.length >= 2 )
      { var tg_form = chkBoxAll.arguments[1]; }
   else
      { var tg_form = document.forms[0]; }

   for ( var i=0; i<tg_form.elements.length; i++ )
       {
        var elem = tg_form.elements[i];
        if ( elem.type != "checkbox" ) { continue; }
        if ( chkBoxAll.arguments.length >= 3 )
           {
            var elemName = chkBoxAll.arguments[2];
            if ( elem.name == elemName ) { elem.checked = chk; }
           }
        else
           { elem.checked = chk; }
       }
  }



// chkBoxCount ( [ OBJECT tg_form, STRING elemName ] )
// chkBoxCount ( self.document.frmMailList, 'chkMsgID')
function chkBoxCount()
  {
   var chkCount = 0;

   if ( chkBoxCount.arguments.length >= 1 )
      { var tg_form = chkBoxCount.arguments[0]; }
   else
      { var tg_form = document.forms[0]; }

   for ( var i=0; i<tg_form.elements.length; i++ )
       {
        var elem = tg_form.elements[i];
        if ( elem.type != "checkbox" ) { continue; }

        if ( chkBoxCount.arguments.length >= 2 )
           {
            var elemName = chkBoxCount.arguments[1];
            if ( elem.name == elemName )
               { if ( elem.checked ) { chkCount += 1; } }
           }
        else
           { if ( elem.checked ) { chkCount += 1; } }
       }

   return chkCount;
  }



// chkBoxValue ( [ OBJECT tg_form, STRING elemName ] )
// chkBoxValue ( self.document.frmMailList, 'chkMsgID')
function chkBoxValue()
  {
   var chkValue = "";

   if ( chkBoxValue.arguments.length >= 1 )
      { var tg_form = chkBoxValue.arguments[0]; }
   else
      { var tg_form = document.forms[0]; }

   for ( var i=0; i<tg_form.elements.length; i++ )
       {
        var elem = tg_form.elements[i];
        if ( elem.type != "checkbox" ) { continue; }
        if ( chkBoxValue.arguments.length >= 2 )
           {
            var elemName = chkBoxValue.arguments[1];
            if ( elem.name == elemName )
               {
                if ( elem.checked )
                   { chkValue = (chkValue==null || chkValue.length==0 || chkValue=="")? elem.value:chkValue+","+elem.value; }
               }
           }
        else
           {
            if ( elem.checked )
               { chkValue = (chkValue==null || chkValue.length==0 || chkValue=="")? elem.value:chkValue+","+elem.value; }
           }
       }

   return chkValue;
  }



// radioChecked ( [ OBJECT radioObj ] ) returns true/false
function radioChecked (radioObj)
  {
   for ( var i=0; i<radioObj.length; i++ )
       {
        if ( radioObj[i].checked )
           { return true; break; }
       }

   return false;
  }
  
  // radioValue ( [ OBJECT radioObj ] ) returns value
  // if not checked then return value 0
function radioValue (radioObj)
  {
   var value = null
   for ( var i=0; i<radioObj.length; i++ )
       {
        if ( radioObj[i].checked )
           { return value = radioObj[i].value }
       }
   return 0;
  }

// return selected radio button value
function radioCheckedVal (radioObj)
  {
   for ( var i=0; i<radioObj.length; i++ )
       {
        if ( radioObj[i].checked )
           { 
            return radioObj[i].value            
            break; 
            }
       }
  }