var digits = "0123456789";
var phoneNumberDelimiters = "()- ";
var validPhoneChars = digits + phoneNumberDelimiters;
var digitsInPhoneNumber = 10;
var digitsInExtension = 4;
var decimalPointDelimiter = ".";


function valstr(str) {  // validate string, other name - trim ;)
	str = str.replace(/^[ ]+/, "");
	str = str.replace(/[ ]+$/, "");
	return str.toLowerCase();
}

function validationAlert(msg, badInput) {
	alert(msg);
	if(badInput.style.display == '') {
		badInput.focus();
		badInput.select();
	}
}

function isNumber(num) {
	if(num.search("^-?[0-9.]+$") != -1)
		return true
	return false
}

function checkRadio(radio) {
	var i;

	if(radio.length) {
		for (i = 0 ; i < radio.length ; i++) {
			if (radio[i].checked) {
				return radio[i].value;
			}
		}
	}
	else {
		return radio.value
	}
}

function re(str, regexp) {
  if (str.match(regexp)) {
  	return true;
  } else {
  	return false;
	}
}

function isEmpty(s)
{   return ((s == null) || (s.length == 0))
}

function isEmail (s) {   
	if (isEmpty(s)) 
       return false;
    
    // there must be >= 1 character before @, start looking at character position 1 
    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 reformat (s)

{   var arg;
    var sPos = 0;
    var resultString = "";

    for (var i = 1; i < reformat.arguments.length; i++) {
       arg = reformat.arguments[i];
       if (i % 2 == 1) resultString += arg;
       else {
           resultString += s.substring(sPos, sPos + arg);
           sPos += arg;
       }
    }
    return resultString;
}

function isPhoneNumber (s)
{   if (isEmpty(s)) 
       if (isPhoneNumber.arguments.length == 1) return defaultEmptyOK;
       else return (isPhoneNumber.arguments[1] == true);
    return (isInteger(s) && s.length == digitsInPhoneNumber)
}

// Removes all characters which do NOT appear in string bag from string s.
function stripCharsNotInBag (s, bag)
{   var i;
    var returnString = "";

    // Search through string's characters one by one.
    // If character is in bag, append to returnString.
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (bag.indexOf(c) != -1) returnString += c;
    }
    return returnString;
}

function isFloat (s)
{   var i;
    var seenDecimalPoint = false;

    if (isEmpty(s)) 
       if (isFloat.arguments.length == 1) return defaultEmptyOK;
       else return (isFloat.arguments[1] == true);
    
    if (s == decimalPointDelimiter) return false;

    // Search through string's characters one by one
    // until we find a non-numeric character.
    // When we do, return false; if we don't, return true.

    for (i = 0; i < s.length; i++)
    {   
        // Check that current character is number.
        var c = s.charAt(i);
        if ((c == decimalPointDelimiter) && !seenDecimalPoint) seenDecimalPoint = true;
        else if (!isDigit(c)) return false;
    }

    // All characters are numbers.
    return true;
}

function isInteger (s)

{   var i;

    if (isEmpty(s)) 
       if (isInteger.arguments.length == 1) return defaultEmptyOK;
       else return (isInteger.arguments[1] == true);

    // Search through string's characters one by one
    // until we find a non-numeric character.
    // When we do, return false; if we don't, return true.

    for (i = 0; i < s.length; i++)
    {   
        // Check that current character is number.
        var c = s.charAt(i);

        if (!isDigit(c)) return false;
    }

    // All characters are numbers.
    return true;
}


function isDigit (c)
{   return ((c >= "0") && (c <= "9"))
}

function isDate(dt) {
	var re = /^\s*\d{1,2}\/\d{1,2}\/\d{2,4}\s*$/i;

	if(dt.search(re) != -1)
		return true
	return false
}

function isDateTime12(timeStr) {
	//var re = /^\s*\d{1,2}\/\d{1,2}\/\d{2,4}\s+\d{1,2}:\d{1,2}\s*(am|pm)\s*$/i;

	//if(dt.search(re) != -1)
	//	return true
	//return false
	
	
	var timePat = /^(\d{1,2}):(\d{2})(:(\d{2}))?(\s?(AM|am|PM|pm))?$/;
	var matchArray = timeStr.match(timePat);
	
	if (matchArray == null) {
		return false;
	}
	
	hour = matchArray[1];
	minute = matchArray[2];
	second = matchArray[4];
	ampm = matchArray[6];

	if (second=="") { second = null; }
	if (ampm=="") { ampm = null }

	if (hour < 0  || hour > 23) {
		return false;
	}
	if (hour <= 12 && ampm == null) {
		return false;
		}
	if  (hour > 12 && ampm != null) {
		return false;
	}
	if (minute<0 || minute > 59) {
		return false;
	}
	if (second != null && (second < 0 || second > 59)) {
		return false;
	}
	
return true;
}

function validatePhone(phoneNum) {
	var phone = '';
	var ext = '';
	var digitsOnly = '';
		
	digitsOnly = stripCharsNotInBag(phoneNum.value, digits);		
	if (digitsOnly.length > 0) {
		if (digitsOnly.length < digitsInPhoneNumber) {
			alert("This field must be at least a 10 digit number (i.e (123)456-7890 x123).  Extension is optional.");
			phoneNum.focus();
			return false;
		}
		else {
			phone = reformat(digitsOnly.substring(0, digitsInPhoneNumber), '(', 3, ') ', 3, '-', 4);
			ext = digitsOnly.substring(digitsInPhoneNumber, digitsInPhoneNumber+digitsInExtension);
			//if (ext.length == 0) 
				phoneNum.value = phone;
			//else
			//	phoneNum.value = phone + " x" + ext;
			//return true;	
		}
	}	
	else {
		if (phoneNum.value.length > 0) {
			alert('This field must be at least a 10 digit number (i.e (123)456-7890 x123).  Extension is optional.');
			phoneNum.focus();
			return false;	
		}	
	}		
}

function isPhone(s) {
	var phone = '';
	var ext = '';
	var digitsOnly = '';
	
	if (isEmpty(s) != true) {
		if (isEmpty(s)) 
		   if (isPhone.arguments.length == 1) return defaultEmptyOK;
		   else return (isPhone.arguments[1] == true);

			digitsOnly = stripCharsNotInBag(s.value, digits);		
	
		if (digitsOnly.length > 0) {
			if (digitsOnly.length < digitsInPhoneNumber) {
				return false;
			}
			else {
				phone = reformat(digitsOnly.substring(0, digitsInPhoneNumber), '(', 3, ') ', 3, '-', 4);
				ext = digitsOnly.substring(digitsInPhoneNumber, digitsInPhoneNumber+digitsInExtension);
				s.value = phone;
				return true;	
			}
		}
	}
	return true;	
}

function isURL (s) {
   if (isEmpty(s)) 
       if (isURL.arguments.length == 1) return defaultEmptyOK;
       else return (isURL.arguments[1] == true);
    
    // the url must begin with www.
    var i = 1;
    var sLength = s.length;

    // look for www.
    if ((s.substring(0, 4)) == "www.")
		i = 5;
	else
		return false;

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

    // there must be at least one character after the second .
    if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
    else return true;
}

var highlightcolor="#EBEDF5"

var ns6=document.getElementById&&!document.all
var previous=''
var eventobj

//Regular expression to highlight only form elements
var intended=/INPUT|TEXTAREA|SELECT|OPTION/

//Function to check whether element clicked is form element
function checkel(which){
if (which.style&&intended.test(which.tagName)){
if (ns6&&eventobj.nodeType==3)
eventobj=eventobj.parentNode.parentNode
return true
}
else
return false
}

//Function to highlight form element
function highlight(e){
	eventobj=ns6? e.target : event.srcElement
	if (previous!=''){
		if (checkel(previous))
			previous.style.backgroundColor=''
	previous=eventobj
	if (checkel(eventobj))
		eventobj.style.backgroundColor=highlightcolor
	}
	else{
		if (checkel(eventobj))
			eventobj.style.backgroundColor=highlightcolor
		previous=eventobj
	}
}

function setColor(el, bg) {
  if (el.style) el.style.backgroundColor = bg;
}