function validRequired(formField,fieldLabel)
{
  var result = true;
  
  if (formField.value == "")
  {
    alert('Please enter a value for the "' + fieldLabel +'" field.');
    formField.focus();
    result = false;
  }
  
  return result;
}

function allDigits(str)
{
  return inValidCharSet(str,"0123456789");
}

function allAlphe(str)
{
  return inValidCharSet(str,"ABCDEFGHIJKLMNOPQRSTUVWXYZ");
}

function inValidCharSet(str,charset)
{
  var result = true;

  // Note: doesn't use regular expressions to avoid early Mac browser bugs  
  for (var i=0;i<str.length;i++)
    if (charset.indexOf(str.substr(i,1))<0)
    {
      result = false;
      break;
    }
  
  return result;
}


function validNum(formField,fieldLabel,required)
{
  var result = true;

  if (required && !validRequired(formField,fieldLabel))
    result = false;
  
  if (result)
  {
    if (!allDigits(formField.value))
    {
      alert('Please enter a number for the "' + fieldLabel +'" field.');
      formField.focus();    
      result = false;
    }
  } 
  
  return result;
}


 function isEmailAddr(email)
{
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
  result = true;
  }
  return result;
}  

 function validEmail(formField,fieldLabel,required)
{
  var result = true;
  
  if (required && !validRequired(formField,fieldLabel))
    result = false;

  if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
  {
    alert("Please enter a complete email address in the form: yourname@yourdomain.com");
    formField.focus();
    result = false;
  }
   
  return result;

}

 
function validate_form(theForm)
{
  // Customize these calls for your form

  // Start ------->
  
    
  if (!validRequired(theForm.FirstName,"First Name"))
    return false;
    
  if (!validRequired(theForm.LastName,"Last Name"))
    return false;
    
  if (!validRequired(theForm.DayPhone,"Daytime Phone Number"))
    return false;
    
  if (!validEmail(theForm.EmailAddress,"Email Address",true))
    return false;
    
   
return true;
}