var requestSubmitted = false;
var whitespace = " \t\n\r";
var defaultEmptyOK = false;
function isEmpty(s)
{   return ((s == null) || (s.length == 0))
}

function isWhitespace (s)

{   var i;

    if (isEmpty(s)) return true;

    for (i = 0; i < s.length; i++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);

        if (whitespace.indexOf(c) == -1) return false;
    }

    // All characters are whitespace.
    return true;
}

function isEmail (s)
{   if (isEmpty(s)) 
       if (isEmail.arguments.length == 1) return defaultEmptyOK;
       else return (isEmail.arguments[1] == true);
   
    // is s whitespace?
    if (isWhitespace(s)) return false;
   
    var i = 1;
    var sLength = s.length;

    // look for @
    while ((i < sLength) && (s.charAt(i) != "@"))
    { i++
    }

    if ((i >= sLength) || (s.charAt(i) != "@")) return false;
    else i += 2;

    // look for .
    while ((i < sLength) && (s.charAt(i) != "."))
    { i++
    }

    // there must be at least one character after the .
    if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
    else return true;
}
	
function CheckTheFields()
{
  if (document.forms[0].First_Name.value == "")
  {
    alert("Please enter a value for the \"First Name\" field.");
    document.forms[0].First_Name.focus();
    return (false);
  }
  if (document.forms[0].Last_Name.value == "")
  {
    alert("Please enter a value for the \"Last Name\" field.");
    document.forms[0].Last_Name.focus();
    return (false);
  }
  var em = isEmail(document.forms[0].Email.value)
  if (!em)
  {
    alert("Please enter a value for the \"Email Address\" field.");
    document.forms[0].Email.focus();
    return (false);
  }
  if (document.forms[0].Comments.value == "")
  {
    alert("Please enter comments for the \"Comments\" field.");
    document.forms[0].Comments.focus();
    return (false);
  }

//prevent multi submit
	if(requestSubmitted == true) 
	{
         alert("You have already submitted " + 
            "the inquiry. Please wait.");
            return;
         }
	requestSubmitted = true;
	document.forms[0].submit();
}