<!-- scripts.js -->
//set of JavaScript functions

// Function to validate email address
function emailCheck (emailStr) {
/* The following pattern is used to check if the entered e-mail address
   fits the user@domain format.  It also is used to separate the username
   from the domain. */
var emailPat=/^(.+)@(.+)$/
/* The following string represents the pattern for matching all special
   characters.  We don't want to allow special characters in the address. 
   These characters include ( ) < > @ , ; : \ " . [ ]    */
var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
/* The following string represents the range of characters allowed in a 
   username or domainname.  It really states which chars aren't allowed. */
var validChars="\[^\\s" + specialChars + "\]"
/* The following pattern applies if the "user" is a quoted string (in
   which case, there are no rules about which characters are allowed
   and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
   is a legal e-mail address. */
var quotedUser="(\"[^\"]*\")"
/* The following pattern applies for domains that are IP addresses,
   rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
   e-mail address. NOTE: The square brackets are required. */
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
/* The following string represents an atom (basically a series of
   non-special characters.) */
var atom=validChars + '+'
/* The following string represents one word in the typical username.
   For example, in john.doe@somewhere.com, john and doe are words.
   Basically, a word is either an atom or quoted string. */
var word="(" + atom + "|" + quotedUser + ")"
// The following pattern describes the structure of the user
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
/* The following pattern describes the structure of a normal symbolic
   domain, as opposed to ipDomainPat, shown above. */
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")


/* Finally, let's start trying to figure out if the supplied address is
   valid. */

/* Begin with the coarse pattern to simply break up user@domain into
   different pieces that are easy to analyze. */
var matchArray=emailStr.match(emailPat)
if (matchArray==null) {
  /* Too many/few @'s or something; basically, this address doesn't
     even fit the general mould of a valid e-mail address. */
	alert("Email address seems incorrect (check @ and .'s)")
	return false
}
var user=matchArray[1]
var domain=matchArray[2]

// See if "user" is valid 
if (user.match(userPat)==null) {
    // user is not valid
    alert("The username doesn't seem to be valid.")
    return false
}

/* if the e-mail address is at an IP address (as opposed to a symbolic
   host name) make sure the IP address is valid. */
var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
    // this is an IP address
	  for (var i=1;i<=4;i++) {
	    if (IPArray[i]>255) {
	        alert("Destination IP address is invalid!")
		return false
	    }
    }
    return true
}

// Domain is symbolic name
var domainArray=domain.match(domainPat)
if (domainArray==null) {
	alert("The domain name doesn't seem to be valid.")
    return false
}

/* domain name seems valid, but now make sure that it ends in a
   three-letter word (like com, edu, gov) or a two-letter word,
   representing country (uk, nl), and that there's a hostname preceding 
   the domain or country. */

/* Now we need to break up the domain to get a count of how many atoms
   it consists of. */
var atomPat=new RegExp(atom,"g")
var domArr=domain.match(atomPat)
var len=domArr.length
if (domArr[domArr.length-1].length<2 || 
    domArr[domArr.length-1].length>3) {
   // the address must end in a two letter or three letter word.
   alert("The address must end in a three-letter domain, or two letter country.")
   return false
}

// Make sure there's a host name preceding the domain.
if (len<2) {
   var errStr="This address is missing a hostname!"
   alert(errStr)
   return false
}

// If we've gotten this far, everything's valid!
return true;
}
// End of email validation function

// *****************************************************************************
// Maybe not used
/*
function setupQuestionAnswer(this, randomName) {
				 var intRandomName = randomName;
				 intRandomName = 1;
				 switch(intRandomName){
				 											 case 1:
															 			this.getElementById('answer').value = "mike";
															 			this.getElementById('questionText').value = "What is Mike's first name";
																		break;
															 case 2:
															 			this.getElementById('answer').value = "roger";
															 			this.getElementById('lblQuestion').value = "What is Roger's first name";
																		break;
															 case 3:
															 			this.getElementById('answer').value = "shirley";
															 			this.getElementById('lblQuestion').value = "What is Shirley's first name";
																		break;
															 case 4:
															 			this.getElementById('answer').value = "joseph";
															 			this.getElementById('lblQuestion').value = "What is Joseph's first name";
																		break;
															 case 5:
															 			this.getElementById('answer').value = "tracy";
															 			this.getElementById('lblQuestion').value = "What is Tracy's first name";
																		break;
					} // end of switch
															 			
} // end of function setupQuestionAnswer()
*/

// *****************************************************************************

// Functions to check required fields
         function isEmpty(str) {
            // Check whether string is empty.
            for (var intLoop = 0; intLoop < str.length; intLoop++)
               if (" " != str.charAt(intLoop))
                  return false;
            return true;
         }

				 /* Ensure Required fields of a form have content */
         function checkRequired(f)
				 {
            var strError = "";
            for (var intLoop = 0; intLoop < f.elements.length; intLoop++)
						{
               if (null!=f.elements[intLoop].getAttribute("required"))
							 { 
                  if (isEmpty(f.elements[intLoop].value))
									{
                     strError += "  " + f.elements[intLoop].name + "\n";
									} // end of if
									/* If the box is an email validate email address */
									var strBoxName = f.elements[intLoop].name;
									if (strBoxName == "email" || strBoxName == "emailAddress")
									{
									    if (!emailCheck(f.elements[intLoop].value))
											{
											    strError += "  " + f.elements[intLoop].name + " " + f.elements[intLoop].value + " is invalid\n";
											} // end of if
									} // end of email check
									// check spam challenge
									if (strBoxName == "answer")
									{
									 	 if ( document.getElementById('answer').value != "roger" )
    								 {
										 strError += "  You must answer Roger's question correctly to submit this form.\n";
										 document.getElementById('answer').value = "";
										 //document.getElementById('answer').focus();
    								 }
									}
							 } // end of if
						} // end of for
						
            if ("" != strError) {
               alert("Required data is missing:\n\n" + strError + "\nPlease complete all required fields \nbefore submitting your request");
               return false;
            } else
						// reset pointer to next page 
						contactformProtect()
            return true       
         }
// End of functions to check required fields

// Reset the form pointer to next page
function contactformProtect() {
	document.getElementById("contact_form").setAttribute("action","contact_safemail.php");
}


// end of scripts.js