function validate_phone()
{
  var prod1 = document.getElementById("product[]1");
  var prod2 = document.getElementById("product[]2");
  var prod3 = document.getElementById("product[]3");
  
  if ((prod1.tagName == "INPUT" && prod1.value.length == 0) || (prod1.tagName == "SELECT" && prod1.selectedIndex <= 0))
  {
    alert("Please supply a valid \"Phone model\" value!");
    prod1.focus();
    return false;
  }
  if (prod2.value.length < 15)
  {
    alert("Please enter a valid IMEI number (at least 15 characters) in the \"IMEI mumber\" field!");
    prod2.focus();
    return false;
  }
  if (prod3.selectedIndex <= 0)
  {
    alert("Please select a valid \"Network\" option!");
    prod3.focus();
    return false;
  }

  return true;
}

function validate_phone_to_network()
{
  var prod2 = document.getElementById("product[]2");
  var prod3 = document.getElementById("product[]3");
  
  if (prod2.value == "")
  {
	alert("Please supply a valid \"Phone model\" value!");
    prod2.focus();
    return false;
  }
  if (prod3.value.length < 15)
  {
    alert("Please enter a valid IMEI number (at least 15 characters) in the \"IMEI mumber\" field!");
    prod3.focus();
    return false;
  }
  return true;
}

function validate_contactform()
{
  var i1 = document.getElementById("name");
  var i2 = document.getElementById("email");
  var i3 = document.getElementById("Inquiry");
  
  if (i1.value == '')
  {
    alert("Please enter your name!");
    i1.focus();
    return false;
  }
  if (i2.value == '')
  {
    alert("Please enter valid email address!");
    i2.focus();
    return false;
  }
  if (i3.value == '')
  {
    alert("Please enter text to send!");
    i3.focus();
    return false;
  }
  
  return true;
}