function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function getElement(psID) { 
   if(document.all) { 
      return document.all[psID]; 
   } else { 
      return document.getElementById(psID); 
   } 
} 

function drawEmailLink(user, domain, toplevel, customcaption) {
	if(customcaption.length > 0)
		document.write('<a href="mailto:' + user + "@" + domain + toplevel + '">' +customcaption + '</a>')
	else
		document.write('<a href="mailto:' + user + "@" + domain + toplevel + '">' + user + "@" + domain + toplevel + '</a>')	
}

function isEmail(emailToCheck)
{
	if (emailToCheck.length > 8)
	{
		if (emailToCheck.indexOf("@") > 0 && emailToCheck.indexOf(".") > 0)
			return true;
		else
			return false;
	}
	else
		return false;
}

function checker(strMode)
{
	return confirm("Are you sure you want to " + strMode + " this item?");
}

function isNumberInt(inputString)
{
  return (!isNaN(parseInt(inputString))) ? true : false;
}

function isNumberFloat(inputString)
{
  return (!isNaN(parseFloat(inputString))) ? true : false;
}

//this is a function that checks the form for submitting. It ASSUMES the 
//form to check is called form1 it checks all the fields in the fieldsToCheck 
//variable and all fields with the word "email" in it
function checkForm(fieldsToCheck) 
{
	var errorCount = 0;
	var emailErrorCount = 0;
	var errorMessage = "The form could not be submitted because of the following error(s): \n\n";
	var i;
	var invalidField;
	//var fieldsToCheck = "txtFirstname|txtSurname|txtBPhoneNumber|txtCPhoneNumber|cboSchool|txtPasswordOne|txtPasswordTwo";
	
	for (i = 0; i < document.form1.elements.length; i++)
	{
		if (document.form1.elements[i].type != "hidden" && fieldsToCheck.indexOf(document.form1.elements[i].name) > -1 && (document.form1.elements[i].value == "" || document.form1.elements[i].value == "invalid")) 
		{
			errorCount++;
			invalidField = document.form1.elements[i];
		}
		if (document.form1.elements[i].name.toUpperCase().indexOf("EMAIL") > -1 && fieldsToCheck.indexOf(document.form1.elements[i].name) > -1 && !isEmail(document.form1.elements[i].value))
		{
			emailErrorCount++;
			invalidField = document.form1.elements[i];
		}
	}
	if (errorCount > 1)
		errorMessage += "* There were " + errorCount + " fields left empty.\n";
	else if (errorCount == 1)
		errorMessage += "* There was " + errorCount + " field left empty.\n";
	if (emailErrorCount > 1)
		errorMessage += "* All email addresses must be valid. There were " + emailErrorCount + " email fields invalid.\n";	
	else if (emailErrorCount == 1)		
		errorMessage += "* All email addresses must be valid. There was " + emailErrorCount + " email field invalid.\n";		
	if (errorCount > 0 || emailErrorCount > 0)
	{
		alert(errorMessage + "\nPlease click OK to try again.");
		invalidField.focus();
		return false;
	}
	else
		return true;
}