/* JS control form to validity of: Not empty, Is numeric, Is email*/

/* ERROR CONSTATNS for alert*/
var notsel  = "Выберите значение из списка.";
var notFilled  = "Заполните все поля.";         // Fild is empty
var notNumeric = "Введите числовые значения.";  // Fild is not numeric
var notEmail   = "Введите корректный Email.";     // Fild is not a valid email address
var notFilledFile = "Загрузите фото!";

function isValidForm(fm)
  {
   var elemLength=fm.elements.length; //number of elements in form
   var isValid = true;
   for ( i=0; i<elemLength; i++ )
     {
      var item = fm.elements.item(i);
      if( item && !item.disabled )    //item exists && not disabled
        {
         if( item.getAttribute('IsNotEmpty') != null )
           {
            if( item.value == "" )
              {
               alert( notFilled );
               isValid = false;
               break;
              }
           }
	if( item.getAttribute('IsNotFile') != null )
           {
            if( item.value == "" )
              {
               alert( notFilledFile );
               isValid = false;
               break;
              }
           }
  	if( item.value == "notSelect" )
           {
               alert( notsel );
               isValid = false;
               break;
             
           }
         if( item.getAttribute('IsNumeric') != null )
           {
            if( item.value.search(/^[\d]+$/) == -1 )  //if not only numbers
              {
               alert( notNumeric );
               isValid = false;
               break;
              }
           }
         if( item.getAttribute('IsEmail') != null )
           {
            if( item.value != "" && item.value.search( /^[\w\-\.]+@[\w\-\.]+\.[\w]+$/ ) == -1 ) //if not bla_bla@bla.bla
              {
               alert( notEmail );
               isValid = false;
               break;
              }
           }
        }
     } // end main IF
   return isValid; //if form is valid {isValid=true}, else {isValid=false}
  }