function GetByID(a) {
x = (document.all) ? document.all[a] : document.getElementById(a);
return x;
}

function SetActiveMenu() {

setTimeout("SetMenu('active1')",600);
setTimeout("SetMenu('active')",800);
}

function SetMenu(c) {

GetByID(document.getElementsByName('ActiveMenu')[0].content).className = c;

}

function checkform()
{
  if ( (document.mainform.MERCH_EMAIL.value == null) || (document.mainform.MERCH_EMAIL.value.length < 2) )
  {
    alert("Заполните поле: Ваш email");
    document.mainform.MERCH_EMAIL.focus();
    return false;
  }

    var x = GetByID('MERCH_EMAIL');

if (! (/^([\w-~_]+\.)*[\w-~_]+@([\w-_]+\.){1,3}\w{2,3}$/.test(document.mainform.MERCH_EMAIL.value)) )
  {
    alert("Введите правильный email адрес");
    document.mainform.MERCH_EMAIL.focus();
    x.style.borderColor = 'red';
    return false;
  } else { x.style.borderColor = ''; }

    var x = GetByID('MERCH_FIO');

  if ( (document.mainform.MERCH_FIO.value == null) || (document.mainform.MERCH_FIO.value.length < 2) )
  {
    alert("Напишите Ваше Имя");
    document.mainform.MERCH_FIO.focus();
    x.style.borderColor = 'red';
    return false;
  } else { x.style.borderColor = ''; }

alert('Ваш заказ успешно отправлен.');

}