// Global functions
function empty_string(what) 
{ 
 if (what == "")
  return true;
 else
  return false;
}
function valid_zip(what) 
{
 if (empty_string(what)) {
  return false;
 }
 var reg = /(^[0-9]{5}$)|(^[0-9]{5}-[0-9]{4}$)/
 
 return reg.test(what);
}
function valid_email(what) 
{
 if (empty_string(what)) {
  return false;
 }
 var reg = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
        return reg.test(what);
}
function check_r_email(email,retype) 
{ 
 if(email==retype)
 return true;
 else
 return false;
}
// Main validation function
function validate()
{
 // Check if any newsletters picked
 if((!(document.getElementById('alert').checked)) && (!(document.getElementById('newsletter_electronic').checked)) && (!(document.getElementById('newsletter_print').checked)))
 {
  alert("Please choose a news item you would like to receive.");
  document.getElementById('alert').focus();
  return false;
 } 
 // If an electronic news item is picked...
 
 if ((document.getElementById('alert').checked) || (document.getElementById('newsletter_electronic').checked)) {
  // Check first name
  if(empty_string(document.getElementById('first').value))
  {
   alert("Please enter your first name.");
   document.getElementById('first').focus();
   document.getElementById('first').select();
   return false;
  }
  // Check last name
  if(empty_string(document.getElementById('last').value))
  {
   alert("Please enter your last name.");
   document.getElementById('last').focus();
   document.getElementById('last').select();
   return false;
  }
  // Check email
  if(!valid_email(document.getElementById('email').value)) 
  {
     alert("I'm sorry. '" + document.getElementById('email').value + "' is not a valid email address. Please try again.");
     document.getElementById('email').focus();
     document.getElementById('email').select();
     return false;
  }
 
 }
 
 if (document.getElementById('newsletter_print').checked) {
  // Check first name
  if(empty_string(document.getElementById('first').value))
  {
   alert("Please enter your first name.");
   document.getElementById('first').focus();
   document.getElementById('first').select();
   return false;
  }
  // Check last name
  if(empty_string(document.getElementById('last').value))
  {
   alert("Please enter your last name.");
   document.getElementById('last').focus();
   document.getElementById('last').select();
   return false;
  }
  // Check address line 1
  if(empty_string(document.getElementById('address1').value))
  {
   alert("Please enter your address.");
   document.getElementById('address1').focus();
   document.getElementById('address1').select();
   return false;
  } 
  // Check city
  if(empty_string(document.getElementById('city').value))
  {
   alert("Please enter your city.");
   document.getElementById('city').focus();
   document.getElementById('city').select();
   return false;
  }
  // Check zip code
  if(!valid_zip(document.getElementById('zip').value)) 
  {
    alert("I'm sorry. '" + document.getElementById('zip').value + "' is not a valid zip code. Please try again.");
    document.getElementById('zip').focus();
    document.getElementById('zip').select();
    return false;
  }
 } 
 
 
 
 
 // All checks passed, return true
 return true;
 
}

function validate_resume() {
 
// Check first name
  if(empty_string(document.getElementById('first').value))
  {
   alert("Please enter your first name.");
   document.getElementById('first').focus();
   document.getElementById('first').select();
   return false;
  }
  // Check last name
  if(empty_string(document.getElementById('last').value))
  {
   alert("Please enter your last name.");
   document.getElementById('last').focus();
   document.getElementById('last').select();
   return false;
  }
  // Check address line 1
  if(empty_string(document.getElementById('address1').value))
  {
   alert("Please enter your address.");
   document.getElementById('address1').focus();
   document.getElementById('address1').select();
   return false;
  } 
  // Check city
  if(empty_string(document.getElementById('city').value))
  {
   alert("Please enter your city.");
   document.getElementById('city').focus();
   document.getElementById('city').select();
   return false;
  }
  // Check zip code
  if(!valid_zip(document.getElementById('zip').value)) 
  {
    alert("I'm sorry. '" + document.getElementById('zip').value + "' is not a valid zip code. Please try again.");
    document.getElementById('zip').focus();
    document.getElementById('zip').select();
    return false;
  }
  // Check Home Phone
  if(empty_string(document.getElementById('hphone').value))
  {
   alert("Please enter your home phone.");
   document.getElementById('hphone').focus();
   document.getElementById('hphone').select();
   return false;
  }
  // Check Day Phone
  if(empty_string(document.getElementById('dphone').value))
  {
   alert("Please enter your day phone.");
   document.getElementById('dphone').focus();
   document.getElementById('dphone').select();
   return false;
  }
  // Check email
  if(!valid_email(document.getElementById('email').value)) 
  {
     alert("I'm sorry. '" + document.getElementById('email').value + "' is not a valid email address. Please try again.");
     document.getElementById('email').focus();
     document.getElementById('email').select();
     return false;
  }
  // Check Salary
  if(empty_string(document.getElementById('salary').value))
  {
   alert("Please enter your salary requirements.");
   document.getElementById('salary').focus();
   document.getElementById('salary').select();
   return false;
  }
  // Check Transcript
  if(empty_string(document.getElementById('file1').value))
  {
   alert("Please enter your transcript.");
   document.getElementById('file1').focus();
   document.getElementById('file1').select();
   return false;
  }

  // Check Cover Letter
  if(empty_string(document.getElementById('file2').value))
  {
   alert("Please enter your cover letter.");
   document.getElementById('file2').focus();
   document.getElementById('file2').select();
   return false;
  }

  // Check Resume
  if(empty_string(document.getElementById('file3').value))
  {
   alert("Please enter your resume.");
   document.getElementById('file3').focus();
   document.getElementById('file3').select();
   return false;
  }

// All checks passed, return true
 return true;
}