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();
}

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 openNewWindow(url,w,h) {
	if (h>screen.height) h=screen.height-100;
	if (w>screen.width) w=screen.width-100;
	var wleft =  (screen.width/2 - w/2);
	var wtop = (screen.height/2 - h/2);
	var newWin = window.open(url, 'PopupWindow', 'width='+w+',height='+h+',left='+wleft+',top='+wtop+',toolbar=no,scrollbars=yes,resizable=yes');
}

function email_Check(e) {
	// test if valid email address, must have @ and .
	var checkEmail = "@.";
	var EmailValid = false;
	var EmailAt = false;
	var EmailPeriod = false;
	for (i = 0;  i < e.length;  i++) {
		ch = e.charAt(i);
		for (j = 0;  j < checkEmail.length;  j++) {
			if (ch == checkEmail.charAt(j) && ch == "@") EmailAt = true;
			if (ch == checkEmail.charAt(j) && ch == ".") EmailPeriod = true;
			if (EmailAt && EmailPeriod) break;
			if (j == checkEmail.length) break;
		}
		// if both the @ and . were in the string
		if (EmailAt && EmailPeriod) {
			EmailValid = true
			break;
		}
	}
	return (EmailValid);
}

function Form1_Validator(f) {
	// check to see if the first name field is blank
	if (f.Form_Firstname.value == "") {
		alert("You must enter your first name! ");
		f.Form_Firstname.focus();
		return (false);
	}
	// check to see if the last name is blank
	if (f.Form_Lastname.value == "") {
		alert("You must enter your surname!");
		f.Form_Lastname.focus();
		return (false);
	}
	// check if email field is blank
	if (f.Form_Email.value == "") {
		alert("You must enter your e-mail address!");
		f.Form_Email.focus();
		return (false);
	}
	// check the email field for basic validity
	EmailValid=email_Check(f.Form_Email.value);
	if (!EmailValid) {
		alert("Your e-mail address doesn't appear to be valid!");
		f.Form_Email.focus();
		return(false);
	}
	return (true);
}

function Form2_Validator(f) {
	// check to see if the first name field is blank
	if (f.Form_Firstname.value == "") {
		alert("You must enter your first name! ");
		f.Form_Firstname.focus();
		return (false);
	}
	// check to see if the last name is blank
	if (f.Form_Lastname.value == "") {
		alert("You must enter your surname!");
		f.Form_Lastname.focus();
		return (false);
	}
	// check to see if the friend's first name field is blank
	if (f.Friends_firstname.value == "") {
		alert("You must enter your\nfriend's first name! ");
		f.Friends_firstname.focus();
		return (false);
	}
	// check to see if the friend's last name is blank
	if (f.Friends_lastname.value == "") {
		alert("You must enter your\nfriend's surname!");
		f.Friends_lastname.focus();
		return (false);
	}
	// check if email field is blank
	if (f.Form_Email.value == "") {
		alert("You must enter your\nfriend's e-mail address!");
		f.Form_Email.focus();
		return (false);
	}
	EmailValid=email_Check(f.Form_Email.value);
	if (!EmailValid) {
		alert("Your friend's e-mail address\ndoesn't appear to be valid!");
		f.Form_Email.focus();
		return(false);
	}
	return (true);
}