function validateForm() 
{
 var okSoFar=true
 with (document.phpformmailer)
 {
  if (eva_name.value=="" && okSoFar)
  {
    okSoFar=false
    alert("Please enter your name.")
    eva_name.focus()
  }

  if (eva_email.value=="" && okSoFar)
  {
    okSoFar=false
    alert("Please enter your email address.")
    eva_email.focus()
  }
  
  var foundAt = eva_email.value.indexOf("@",0)
  if (foundAt < 1 && okSoFar)
  {
    okSoFar = false
    alert ("Please enter a valid email address.")
    eva_email.focus()
  }

  if (eva_departure.value=="" && okSoFar)
  {
    okSoFar=false
    alert("Please select your departure date.")
    eva_departure.focus()
  }
  if (okSoFar==true)  submit();
 }
}