var timerID = null;
var timerRunning = false;
function stopclock (){
if(timerRunning)
clearTimeout(timerID);
timerRunning = false;
}
function showtime () {
var now = new Date();
var hours = now.getHours();
var minutes = now.getMinutes();
var seconds = now.getSeconds()
var timeValue = "" + ((hours >12) ? hours -12 :hours)
if (timeValue == "0") timeValue = 12;
timeValue += ((minutes < 10) ? ":0" : ":") + minutes
timeValue += ((seconds < 10) ? ":0" : ":") + seconds
timeValue += (hours >= 12) ? " P.M." : " A.M."
document.clock.face.value = timeValue;
timerID = setTimeout("showtime()",1000);
timerRunning = true;
}
function startclock() {
stopclock();
showtime();
}
function displayDate() {
var months=new Array(13);
months[1]="January";
months[2]="February";
months[3]="March";
months[4]="April";
months[5]="May";
months[6]="June";
months[7]="July";
months[8]="August";
months[9]="September";
months[10]="October";
months[11]="November";
months[12]="December";
var time=new Date();
var lmonth=months[time.getMonth() + 1];
var date=time.getDate();
var year=time.getYear();
if (year < 2000)   
   year = year + 1900;
document.write(lmonth + " ");
document.write(date + ", " + year);
}
function NewWindow(url,windowname,width,height,features)
{
   width=(width)?width:screen.width/2;
   height=(height)?height:screen.height/2;
   var screenX = 30;//(screen.width/2 - width/2);
   var screenY = 30;//(screen.height/2 - height/2);
   var features= "width=" + width + ",height=" + height +",scrollbars=yes,status=no";
   features += ",screenX=" + screenX + ",left=" + screenX;
   features += ",screenY=" + screenY + ",top=" + screenY;
   
   var mywin=window.open(url, windowname, features);
   if (mywin)
   mywin.focus();
   return mywin;
}
function HelpWindow(url) {
   NewWindow(url,'help','500','450','yes');
}
function checkAll(the_form) {
   z = 0;
//   var the_form = document.addgroup_form;
   for (z=0; z < the_form.elements.length; z++) {
	  if (the_form.elements[z].type == 'checkbox' && the_form.elements[z].name != 'checkall') {
		 // is it already checked?
		 if (the_form.elements['checkall'].checked) {
			the_form.elements[z].checked = true;
		 }
		 else {
			the_form.elements[z].checked = false;
		 }
	  }
   }
}

  function selectRow(id, g) {
	  color = '#FFFFCC';
	  original = '#FFFFFF';
//	  if (document.layers) { document[id].bgColor = color == 'transparent' ? null : color; }
//	  else if (document.all) {    document.all[id].style.backgroundColor = color; }
//	  else if (document.getElementById) {
	  if (document.forms['inbox_form'].elements[g].checked) {
		    document.getElementById(id).style.backgroundColor = color; 
	  }
	  else {
		    document.getElementById(id).style.backgroundColor = original; 
	  }
  }


function checkAllBoxes(the_form, action) {
   // action: 0=invert selection, 1=select all, 2=select none
   z = 0;
   switch (action) {
	  case 0: 
		 for (z=0; z < the_form.elements.length; z++) {
			if (the_form.elements[z].type == 'checkbox' && the_form.elements[z].name != 'checkall') {
			   // is it already checked?
			   if (!the_form.elements[z].checked) {
				  the_form.elements[z].checked = true;
				  var s = the_form.elements[z].name.substr(1);
				  var s2 = "row" + s;
				  selectRow(s2, the_form.elements[z].name);
			   }
			   else {
				  the_form.elements[z].checked = false;
				  var s = the_form.elements[z].name.substr(1);
				  var s2 = "row" + s;
				  selectRow(s2, the_form.elements[z].name);
			   }
			}
		 }
	  break;
	  case 1:
	  	 for (z=0; z < the_form.elements.length; z++) {
			if (the_form.elements[z].type == 'checkbox' && the_form.elements[z].name != 'checkall') {
			   // is it already checked?
			   if (!the_form.elements[z].checked) {
				  the_form.elements[z].checked = true;
				  var s = the_form.elements[z].name.substr(1);
				  var s2 = "row" + s;
				  selectRow(s2, the_form.elements[z].name);
			   }
			}
		 }

	  break;
	  case 2:
	  	 for (z=0; z < the_form.elements.length; z++) {
			if (the_form.elements[z].type == 'checkbox' && the_form.elements[z].name != 'checkall') {
			   // is it already checked?
			   if (the_form.elements[z].checked) {
				  the_form.elements[z].checked = false;
				  var s = the_form.elements[z].name.substr(1);
				  var s2 = "row" + s;
				  selectRow(s2, the_form.elements[z].name);
			   }
			}
		 }

	  break;
	  default:
	  break;
   }
}

function verify_form(the_form) {
   for (z=0; z < the_form.elements.length; z++) {
	  if (the_form.elements[z].type == 'checkbox' && the_form.elements[z].name != 'checkall') {
		 if (the_form.elements[z].checked) {
			// if we find any selected, then return true
			return true;
		 }
	  }
   }
   alert("You must select at least one student.");
   return false;
}
function verify_form_and_confirm(the_form,message) {
   for (z=0; z < the_form.elements.length; z++) {
	  if (the_form.elements[z].type == 'checkbox' && the_form.elements[z].name != 'checkall') {
		 if (the_form.elements[z].checked) {
			// if we find any selected, then do a 'confirm' before returning true
			var answer = confirm(message);
			if (answer) { return true; }
			else { return false; }
		 }
	  }
   }
   alert("You must select at least one student.");
   return false;
}
function verify_form_and_confirm(the_form,message,error_message) {
   for (z=0; z < the_form.elements.length; z++) {
	  if (the_form.elements[z].type == 'checkbox' && the_form.elements[z].name != 'checkall') {
		 if (the_form.elements[z].checked) {
			// if we find any selected, then do a 'confirm' before returning true
			var answer = confirm(message);
			if (answer) { return true; }
			else { return false; }
		 }
	  }
   }
   alert(error_message);
   return false;
}

function Confirm(the_form, message) {
   var answer = confirm(message);
   if (answer) { return true; }
   else { return false; }
}

function round_decimals(original_number, decimals) {
   var result1 = original_number * Math.pow(10, decimals)
   var result2 = Math.round(result1)
   var result3 = result2 / Math.pow(10, decimals)
   return pad_with_zeros(result3, decimals);
}

function pad_with_zeros(rounded_value, decimal_places) {

   // Convert the number to a string
   var value_string = rounded_value.toString()
   
   // Locate the decimal point
   var decimal_location = value_string.indexOf(".")

   // Is there a decimal point?
   if (decimal_location == -1) {
	  
	  // If no, then all decimal places will be padded with 0s
	  decimal_part_length = 0
	  
	  // If decimal_places is greater than zero, tack on a decimal point
	  value_string += decimal_places > 0 ? "." : ""
   }
   else {

	  // If yes, then only the extra decimal places will be padded with 0s
	  decimal_part_length = value_string.length - decimal_location - 1
   }
   
   // Calculate the number of decimal places that need to be padded with 0s
   var pad_total = decimal_places - decimal_part_length
   
   if (pad_total > 0) {
	  
	  // Pad the string with 0s
	  for (var counter = 1; counter <= pad_total; counter++) 
			value_string += "0"
	  }
   return value_string;
}

function emailCheck (emailStr) {

/* 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("Email address seems incorrect (check @ and .'s)");
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("Ths username contains invalid characters.");
return false;
   }
}
for (i=0; i<domain.length; i++) {
if (domain.charCodeAt(i)>127) {
alert("Ths domain name contains invalid characters.");
return false;
   }
}

// 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.  Check if its 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("The domain name does not seem to be valid.");
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("The address must end in a well-known domain or two letter " + "country.");
return false;
}

// Make sure theres a host name preceding the domain.

if (len<2) {
alert("This address is missing a hostname!");
return false;
}

// If we've gotten this far, everything's valid!
return true;
}

function isblank(fe){
   	  // check that the value is not empty
   	  if (fe.value == "") {
   		 // its blank
   		 return true;
   	  } else {
   		 // it has data
   		 return false;
   	  }
}

function verify(frm, fields, msg) {
      // get fields marked required
      fieldarray = fields.split(",");
      
      // loop through all the elements on the form
      for (i=0; i<frm.elements.length; i++){
   	  
   	  // loop through each of the required fieldnames
   	  for (j=0; j<fieldarray.length; j++) {
   		 
   			// if a field is required (and were processing that field) and its blank
   			if (  fieldarray[j] == frm.elements[i].name ) {
   			   if (isblank(frm.elements[i])) {
   				  // display an error
   				  alert(msg);
   				  // set the cursor to he field that threw the error
   				  frm.elements[i].focus();
   				  // block the form from submitting
   				  return false;
   			   }
   			   // only apply the ' filtering to the fields we're checking (i.e. not the '1-10 schools' field)
   			   
   			   // now check and remove any ' or " in there...
   			   out = "'"; // replace this
   			   add = " "; // with this
   			   temp = "" + frm.elements[i].value; // temporary holder
   
   			   while (temp.indexOf(out)>-1) {
   				  pos= temp.indexOf(out);
   				  temp = "" + (temp.substring(0, pos) + add + 
   				  temp.substring((pos + out.length), temp.length));
   			   }
   			   frm.elements[i].value = temp;
   		 
   			}
   	  }
      }
      
      // exit clean and allow form to submit but check email address first!
	  if (emailCheck(frm.email.value)) {
		 return true;
	  }
	  else {
		 return false;
	  }
} 


function setVisibility(objId, sVisibility) {
        var obj = document.getElementById(objId);
         obj.style.display = sVisibility;
}
function setVisibility2(frm, objId, elem, sVisibility, original) {
        var obj = document.getElementById(objId);
	if (document.forms['register_interest'].elements['when'].selectedIndex == elem) {
           obj.style.display = sVisibility;
	}
	else {
           obj.style.display = original;
	}
}

function ViewDemo() {
   document.login.uname.value="demo";
   document.login.passwd.value="demo";
   document.login.submit();
}