//=====================================================================================
// IS STRING AN ALPHA STRING
//=====================================================================================
function isAlphabetic (s) {
	var i;
	for (i = 0; i < s.length; i++) {   
		var c = s.charAt(i);
		if (!isLetter(c)) { return false;}
	}
	return true;
}

//=====================================================================================
//VALIDATE NAME
//=====================================================================================
function ValidateName(fld, allownumbers, msg1, msg2) {
	var fldname = eval("document.forms[0]."+fld+".value");
	if (fldname.length < 2) {
		alert(msg1 + " is a required field.\n" + msg2);
		return false;
	}

	var capLetters="ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	var c = fldname.charAt(0);
	if (capLetters.indexOf(c) == -1) { 
		fldname = c.toUpperCase() + fldname.substr(1,fldname.length);
		var fldObj = eval("document.forms[0]."+fld);
		fldObj.value = fldname;
	}

	if (fldname.indexOf(" ") !=-1) {
		alert(msg1 + " can only be one word and/or cannot contain spaces.\n" + msg2);
		return false;
	}

	switch (allownumbers) {
	case "Y":
		var okchars="0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
		for (var i = 0; i < fldname.length; i++) {   
			var c = fldname.charAt(i);
			if (okchars.indexOf(c) == -1) { 
				alert(msg1 + " cannot contain any special characters.\n" + msg2);
				return false;
			}
		}
		break;
	default:
		if (isAlphabetic(fldname)==false) {
			alert(msg1 + " can only contain letters.\n" + msg2);
			return false;
		}
		break;
	} // end-switch
	return true;
}

//=====================================================================================
//VALIDATE EMAIL
//=====================================================================================
function ValidateEmail (emailStr) {
	emailStr = emailStr.toLowerCase();
	/* The following variable tells the rest of the function whether or not
	to verify that the address ends in a two-letter country or well-known
	TLD.  1 means check it, 0 means don't. */

	var checkTLD=1;

	/* The following is the list of known TLDs that an e-mail address must end with. */

	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;

	/* 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("SUBMISSION FAILED: Email address incorrect (check @ and periods)");
		return false;
	}

	var user=matchArray[1];
	var domain=matchArray[2];

	// Start by checking that only basic ASCII characters are in the strings (0-127).

	for (i=0; i<user.length; i++) {
		if (user.charCodeAt(i)>127) {
			alert("SUBMISSION FAILED: Email username contains invalid characters.");
			return false;
		}
	}

	for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
			alert("SUBMISSION FAILED: Email domain name contains invalid characters.");
			return false;
		}
	}

	// See if "user" is valid 

	if (user.match(userPat)==null) {	// user is not valid
		alert("SUBMISSION FAILED: Email username is invalid.");
		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("SUBMISSION FAILED: Email destination IP address is invalid!");
				return false;
			}
		}
		return true;
	}

	// Domain is symbolic name.  Check if it's valid.
 
	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	for (i=0;i<len;i++) {
		if (domArr[i].search(atomPat)==-1) {
			alert("SUBMISSION FAILED: Email domain name is invalid.");
			return false;
		}
	}

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

	if (checkTLD && domArr[domArr.length-1].length!=2 && 
		domArr[domArr.length-1].search(knownDomsPat)==-1) {
		alert("SUBMISSION FAILED: Email address must end in a well-known domain or two letter country.");
		return false;
	}

	// Make sure there's a host name preceding the domain.

	if (len<2) {
		alert("SUBMISSION FAILED: Email address is missing a hostname!");
		return false;
	}

	return true;
}

// VALIDATE MULTIPLE FIELDS CHECK BOX FUNCTION
function ValidateMultiFieldCheckBox(totfld, htag, m, fld, plusNum, msg1, msg2) {
	for (var x = 1; x <= totfld; x++) {
		var max = eval("document.forms[0]."+fld+x+".length");
		if (max == null) {
			if (eval("document.forms[0]."+fld+x+".checked")==false) {
				alert(msg1+" "+(x + plusNum)+"\n"+msg2);
				window.location.hash=htag+x;
				return false;
			}
		} else {
			var total = 0;
			for (var i = 0; i < max; i++) {
				if (eval("document.forms[0]."+fld+x+"[" + i + "].checked") == true) {
				    total += 1;
				}
			}
			if (total < m) {	//error not enough checked selections
				alert(msg1+" "+(x + plusNum)+"\n"+msg2);
				window.location.hash=htag+x;
				return false;	
			}
		}
	}  // end-for loop
	return true;	
}

// GET FIELD VALUE FUNCTION
function getFieldValue(field)
{
   switch(field.type)
   {
      case "text" :
      	return field.value;
      case "textarea":
      case "hidden" :
         return field.value;
      case "select-one" :
         var i = field.selectedIndex;
         if (i == -1)   return "";
         else   return (field.options[i].value == "") ? field.options[i].text : field.options[i].value;
      case "radio" :
      case "checkbox" :
         if (field.checked) { return field.value; } else { return ""; }
      default :
         if(field[0].type == "radio")
         {
            for (i = 0; i < field.length; i++)
               if (field[i].checked)
                  return field[i].value;
            return "";
         }
         else if(field[0].type == "checkbox")
         {
            var allChecked = new Array();
            for(i = 0; i < field.length; i++)
               if(field[i].checked)
                  allChecked[allChecked.length] = field[i].value;
            return allChecked;
         }
         else
            var str = "";
            for (x in field) { str += x + "\n"; }
            alert("I couldn't figure out what type this field is...\n\n" + field.name + ": ???\n\n\n" + str + "\n\nlength = " + field.length);
         break;
   }
     return "";
}

//GET REF FUNCTION
function getRef(id)
{
	var isDOM = (document.getElementById ? true : false); 
	var isIE4 = ((document.all && !isDOM) ? true : false);
	var isNS4 = (document.layers ? true : false);
	var isDyn = (isDOM || isIE4 || isNS4);

	 if (isDOM) return document.getElementById(id);
	 if (isIE4) return document.all[id];
	 if (isNS4) return document.layers[id];
}

//DISPLAY QUESTIONS FUNCTION
function displayAllQuestions() {
	var f = document.forms[0];
	var courseSystem = getFieldValue(f.CourseType);
	f.CourseSystem.value = courseSystem;
	//alert("COURSESYSTEM FIELD VALUE: " +f.CourseSystem.value);
	questionsByCourseSystem();
	var quesDisplay = getRef("Questions");
	quesDisplay.style.display = "";
	return;
}

//QUESTIONS BY COURSESYSTEM FUNCTION
function questionsByCourseSystem() {
	var f = document.forms[0];
	var questionSLN;
	var questionCS;
	var courseSystem = f.CourseSystem.value;
	if (courseSystem=="ONLINE") {
		//DISPLAY ONLINE AND HIDE BLENDED
		questionSLN = getRef("SLN1");
		questionCS = getRef("CS1");
		questionSLN.style.display = "";
		questionCS.style.display = "none";
		questionSLN = getRef("SLN24");
		questionSLN.style.display = "";
		questionSLN = getRef("SLN25");
		questionSLN.style.display = "";
		questionSLN = getRef("SLN43");
		questionCS = getRef("CS41");
		questionSLN.style.display = "";
		questionCS.style.display = "none";
		questionSLN = getRef("SLN44");
		questionCS = getRef("CS42");
		questionSLN.style.display = "";
		questionCS.style.display = "none";
		//VERIFY NUMBERS ON ALL QUESTIONS AFTER 25 FOR ONLINE
		questionSLN = getRef("SLN26");
		questionSLN.innerHTML = "26";
		questionSLN = getRef("SLN27");
		questionSLN.innerHTML = "27";
		questionSLN = getRef("SLN28");
		questionSLN.innerHTML = "28";
		questionSLN = getRef("SLN29");
		questionSLN.innerHTML = "29";
		questionSLN = getRef("SLN30");
		questionSLN.innerHTML = "30";
		questionSLN = getRef("SLN31");
		questionSLN.innerHTML = "31";
		questionSLN = getRef("SLN32");
		questionSLN.innerHTML = "32";
		questionSLN = getRef("SLN33");
		questionSLN.innerHTML = "33";
		questionSLN = getRef("SLN34");
		questionSLN.innerHTML = "34";
		questionSLN = getRef("SLN35");
		questionSLN.innerHTML = "35";
		questionSLN = getRef("SLN36");
		questionSLN.innerHTML = "36";
		questionSLN = getRef("SLN37");
		questionSLN.innerHTML = "37";
		questionSLN = getRef("SLN38");
		questionSLN.innerHTML = "38";
		questionSLN = getRef("SLN39");
		questionSLN.innerHTML = "39";
		questionSLN = getRef("SLN40");
		questionSLN.innerHTML = "40";
		questionSLN = getRef("SLN41");
		questionSLN.innerHTML = "41";
		questionSLN = getRef("SLN42");
		questionSLN.innerHTML = "42";
		questionSLN = getRef("SLN45");
		questionSLN.innerHTML = "45";
		questionSLN = getRef("SLN46");
		questionSLN.innerHTML = "46";
		questionSLN = getRef("SLN47");
		questionSLN.innerHTML = "47";
		questionSLN = getRef("SLN48");
		questionSLN.innerHTML = "48";
	}else{
		//DISPLAY BLENDED AND HIDE ONLINE
		questionSLN = getRef("SLN1");
		questionCS = getRef("CS1");
		questionSLN.style.display = "none";
		questionCS.style.display = "";
		questionSLN = getRef("SLN24");
		questionSLN.style.display = "none";
		questionSLN = getRef("SLN25");
		questionSLN.style.display = "none";
		questionSLN = getRef("SLN43");
		questionCS = getRef("CS41");
		questionSLN.style.display = "none";
		questionCS.style.display = "";
		questionSLN = getRef("SLN44");
		questionCS = getRef("CS42");
		questionSLN.style.display = "none";
		questionCS.style.display = "";
		//CHANGE NUMBERS ON ALL QUESTIONS	 AFTER 23 FOR BLENDED
		questionSLN = getRef("SLN26");
		questionSLN.innerHTML = "24";
		questionSLN = getRef("SLN27");
		questionSLN.innerHTML = "25";
		questionSLN = getRef("SLN28");
		questionSLN.innerHTML = "26";
		questionSLN = getRef("SLN29");
		questionSLN.innerHTML = "27";
		questionSLN = getRef("SLN30");
		questionSLN.innerHTML = "28";
		questionSLN = getRef("SLN31");
		questionSLN.innerHTML = "29";
		questionSLN = getRef("SLN32");
		questionSLN.innerHTML = "30";
		questionSLN = getRef("SLN33");
		questionSLN.innerHTML = "31";
		questionSLN = getRef("SLN34");
		questionSLN.innerHTML = "32";
		questionSLN = getRef("SLN35");
		questionSLN.innerHTML = "33";
		questionSLN = getRef("SLN36");
		questionSLN.innerHTML = "34";
		questionSLN = getRef("SLN37");
		questionSLN.innerHTML = "35";
		questionSLN = getRef("SLN38");
		questionSLN.innerHTML = "36";
		questionSLN = getRef("SLN39");
		questionSLN.innerHTML = "37";
		questionSLN = getRef("SLN40");
		questionSLN.innerHTML = "38";
		questionSLN = getRef("SLN41");
		questionSLN.innerHTML = "39";
		questionSLN = getRef("SLN42");
		questionSLN.innerHTML = "40";
		questionSLN = getRef("SLN45");
		questionSLN.innerHTML = "43";
		questionSLN = getRef("SLN46");
		questionSLN.innerHTML = "44";
		questionSLN = getRef("SLN47");
		questionSLN.innerHTML = "45";
		questionSLN = getRef("SLN48");
		questionSLN.innerHTML = "46";
	}
}

//Variable to ensure the form is only submitted once
var submitcount=0;

//SUBMIT DOC FUNCTION
function SubmitDoc() {
	if (ValidateForm() == false) { 
		return false; 
	} else { 
		if (submitcount == 0) {
     		submitcount++;
     		document.forms[0].submit();
     	} else {
      		alert("This form has already been submitted.  Thanks!");
      		return false;
     	}
	}
}

//VALIDATE FORM FUNCTION
function ValidateForm() {
	var f = document.forms[0];
	var CourseSystem = getFieldValue(f.CourseSystem);
	var quesNumLabel;
	if (ValidateName("FName","Y","Submission failed: First Name is required","")==false) {
		f.FName.focus();
		return false;
	}
	if (ValidateName("LName","Y","Submission failed: Last Name is required","")==false) {
		f.LName.focus();
		return false;
	}
	var email = f.Email.value;
	if (ValidateEmail (email)==false) {
		f.Email.focus();
		return false;
	}
	var emailVerify = f.EmailVerify.value;
	if (email != emailVerify) {
		alert("Submission failed: The information entered in the email address fields does not match.  Please re-enter the email address.");
		f.EmailVerify.focus();
		return false;
	}
	if (getFieldValue(f.Workshop) == "" || getFieldValue(f.Workshop) == "SELECT") {
		alert('Submission failed: Workshop is required');
		f.Workshop.focus();
		return false;
	}
	if (getFieldValue(f.Course) == "") {
		alert('Submission failed: Course is required');
		f.Course.focus();
		return false;
	}
	if (CourseSystem == "ONLINE") {
		if (getFieldValue(f.courseAnswer1) == "") {
			alert('Submission failed: Question 1 is required');
			location.hash = "courseQ1";
			return false;
		}
	} else {
		if (getFieldValue(f.courseAnswer2) == "") {
			alert('Submission failed: Question 1 is required');
			location.hash = "courseQ2";
			return false;
		}
	}
	if (getFieldValue(f.courseAnswer3) == "") {
		alert('Submission failed: Question 2 is required');
		location.hash = "courseQ3";
		return false;
	}
	if (getFieldValue(f.courseAnswer4) == "") {
		alert('Submission failed: Question 3 is required');
		location.hash = "courseQ4";
		return false;
	}	
	if (ValidateMultiFieldCheckBox(20, "ccsQ", "1", "ccsAnswer", 3,
	"Submission Failed: You must enter a response for Question",
	"Please fill in the missing information and resubmit the form.") == false) { 
		return false;
	}
	if (CourseSystem == "ONLINE") {
		if (getFieldValue(f.ccsAnswer21) == "") {
			alert('Submission failed: Question 24 is required');
			location.hash = "ccsQ21";
			return false;
		}
		if (getFieldValue(f.ccsAnswer22) == "") {
			alert('Submission failed: Question 25 is required');
			location.hash = "ccsQ22";
			return false;
		}
	}
	if (CourseSystem == "ONLINE") {
		quesNumLabel = 25;
	} else {
		quesNumLabel = 23;
	}
	if (ValidateMultiFieldCheckBox(6, "idoQ", "1", "idoAnswer", quesNumLabel,
	"Submission Failed: You must enter a response for Question",
	"Please fill in the missing information and resubmit the form.") == false) { 
		return false;
	}
	if (CourseSystem == "ONLINE") {
		quesNumLabel = 31;
	} else {
		quesNumLabel = 29;
	}
	if (ValidateMultiFieldCheckBox(6, "fdQ", "1", "fdAnswer", quesNumLabel,
	"Submission Failed: You must enter a response for Question",
	"Please fill in the missing information and resubmit the form.") == false) { 
		return false;
	}
	if (CourseSystem == "ONLINE") {
		quesNumLabel = 37;
	} else {
		quesNumLabel = 35;
	}
	if (ValidateMultiFieldCheckBox(5, "diQ", "1", "diAnswer", quesNumLabel,
	"Submission Failed: You must enter a response for Question",
	"Please fill in the missing information and resubmit the form.") == false) { 
		return false;
	}
	if (CourseSystem == "ONLINE") {
		if (getFieldValue(f.loAnswer1) == "") {
			alert('Submission failed: Question 43 is required');
			location.hash = "loQ1";
			return false;
		}
		if (getFieldValue(f.loAnswer3) == "") {
			alert('Submission failed: Question 44 is required');
			location.hash = "loQ3";
			return false;
		}
	} else {
		if (getFieldValue(f.loAnswer2) == "") {
			alert('Submission failed: Question 41 is required');
			location.hash = "loQ2";
			return false;
		}
		if (getFieldValue(f.loAnswer4) == "") {
			alert('Submission failed: Question 42 is required');
			location.hash = "loQ4";
			return false;
		}
	}
	if (CourseSystem == "ONLINE") {
		quesNumLabel = 46;
	} else {
		quesNumLabel = 44;
	}
	if (getFieldValue(f.loAnswer6) == "") {
		alert('Submission failed: Question ' + quesNumLabel + ' is required');
		location.hash = "loQ6";
		return false;
	}
	quesNumLabel = quesNumLabel + 1
	if (getFieldValue(f.loAnswer6) == "1") {
		if (getFieldValue(f.loAnswer7) == "") {
			alert('Submission failed: Question ' + quesNumLabel + ' is required');
			location.hash = "loQ7";
			return false;
		}
	}
	if (getFieldValue(f.loAnswer7) == "2") {
		if (getFieldValue(f.loAnswer8) == "") {
			alert('Submission failed: MERLOT was not used in the classroom.  You must explain why not.');
			f.loAnswer8.focus();
			return false;
		}
	}
	quesNumLabel = quesNumLabel + 1
	if (getFieldValue(f.loAnswer7) == "1") {
		if (getFieldValue(f.loAnswer9) == "") {
			alert('Submission failed: MERLOT was used in the classroom.  Question ' + quesNumLabel + ' is required');
			location.hash = "loQ9";
			return false;
		}
	}
}