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_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_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 MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}

function valContactForm(form)
{
	var isValid = true;
	var errStr = '';
	
	if(0 == form.txtName.value.length)
	{
		isValid = false;
		errStr += '* Please enter your name.\n';
	}
	if(0 == form.txtEmail.value.length)
	{
		isValid = false;
		errStr += '* Please enter your email address.\n';
	}

	if(!isValid)
	{
		alert(errStr);
		return false;
	}
	else
		return true;
}

function valApplicationForm(form)
{
	var isValid = true;
	var errStr = '';
	if(0 == form.txtFamilyName.value.length)
	{
		isValid = false;
		errStr += '* Please enter your family name.\n';
	}
	if(0 == form.txtGivenNames.value.length)
	{
		isValid = false;
		errStr += '* Please enter your given name(s).\n';
	}
	/*
	if(0 == form.txtNationality.value.length)
	{
		isValid = false;
		errStr += '* Please enter your nationality.\n';
	}
	if(0 == form.txtPassportNumber.value.length)
	{
		isValid = false;
		errStr += '* Please enter your passport number.\n';
	}	
	if(0 == form.txtVisaType.value.length)
	{
		isValid = false;
		errStr += '* Please enter your Visa type.\n';
	}
	if(0 == form.txtVisaExpiryDate.value.length)
	{
		isValid = false;
		errStr += '* Please enter the expiry date on your visa.\n';
	}
	if(0 == form.txtDoB.value.length)
	{
		isValid = false;
		errStr += '* Please enter your date of birth.\n';
	}
	if(0 == form.txtAge.value.length)
	{
		isValid = false;
		errStr += '* Please enter your age.\n';
	}
	if(0 == form.txtEmail.value.length)
	{
		isValid = false;
		errStr += '* Please enter your email address.\n';
	}	
	if(0 == form.txtOverseasAddress.value.length)
	{
		isValid = false;
		errStr += '* Please enter your overseas address.\n';
	}
	if(0 == form.txtEnglishLevel.value.length)
	{
		isValid = false;
		errStr += '* Please specify the years studied English.\n';
	}
	if(true == form.ckHomeStay.checked && 0 == form.txtHomestayWeeks.value.length)
	{
		isValid = false;
		errStr += '* Please enter how many week you would like to spend in homestay.\n';
	}
	if(true == form.ckAirportPickup.checked && 0 == form.txtArrivalDetails.value.length)
	{
		isValid = false;
		errStr += '* Please enter your arrival details.\n';
	}
	if(0 == form.txtStartingDate.value.length)
	{
		isValid = false;
		errStr += '* Please enter your course starting date.\n';
	}
	if(true == form.ckFutureAustStudy.checked && 0 == form.txtFutureAustStudy.value.length)
	{
		isValid = false;
		errStr += '* Please enter which Australian institution you would like to study in the future.\n'
	}
	*/
	if(!form.ckDeclared.checked)
	{
		isValid = false;
		errStr += '* Your must agree to the terms before submiting your application.\n';
	}

	if(!isValid)
	{
		alert(errStr);
		return false;
	}
	else
		return true;
}

function displayCourseTerm(courseId)
{
	var termsContainer = document.getElementById('terms');
	for(i = 0; i<termsContainer.childNodes.length; i++)
	{
		node = termsContainer.childNodes[i];
		if (node.nodeName=="DIV") {
			node.style.display = 'none';
		}
	}

	var selectedCourseSection = document.getElementById('course_terms_' + courseId);
	if(selectedCourseSection != null)
		selectedCourseSection.style.display = 'block';
}