//Returns true if a string contains only whitespace
function isBlank(s){ 
	for(var i = 0; i < s.length; i++){
		var c = s.charAt(i);
		if((c!=' ') && (c != '\n') && (c != '\t')) return false;
	}
	return true;
}

//This function performs the verification.  It is invoked from the onSubmit() event handler,
//which should return whatever this function returns
function verify(f){
	var msg;
	var empty_fields = "";
	var errors = "";

	//Loop through the form elements, looking for text and textarea elements that don't have an 'optional'
	//property defined.  Check for blank fields, and make a list of them.  If any of these elements have a 
	//'min' or 'max' property defined, verify that they are indeed numbers within the correct range.
	//Put together error messages for fields that are wrong.
	for(var i = 0; i < f.length; i++){
		var e = f.elements[i];
		if(((e.type == "text") || (e.type == "textarea")) & !e.optional){
			if((e.value == null) || (e.value == "") || isBlank(e.value)){
				empty_fields += "\n     " + e.name;
				continue;
			}

			//Check for fields that should be numeric
			if (e.numeric || (e.min != null) || (e.max != null)) {
				var v = parseFloat(e.value);
				if (isNaN(v) ||
					((e.min != null) && (v < e.min)) ||
					((e.max != null) && (v > e.max))) {
					errors += "- The field " + e.name + " must be a number";
					if (e.min != null)
						errors += " greater than " + (e.min -1);
					if (e.max != null && e.min != null)
						errors += " and less than " + (e.max +1);
					else if (e.max != null)
						errors += " that is less than " + e.max;
					errors += ".\n\n Your member ID can be found below the barcode on\n the front of you membership card.";
				}
			}
		}
	}

	//If there were any errors, display the messages and return false
	//to prevent the form being submitted, otherwise return true
	if(!empty_fields && !errors) return true;

	msg = "___________________________________________________\n\n"
	msg +="The form was not submitted because of the following error(s).\n";
	msg +="Please correct these error(s) and re-submit.\n";
	msg +="___________________________________________________\n\n";

	if (empty_fields) {
		msg += "- The following required field(s) are empty:"
			+ empty_fields + "\n";
		if (errors) msg += "\n";
	}	
	msg += errors;
	alert(msg);
	return false;
}


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_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_findObj(n, d) { //v3.0
  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); return x;
}

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 statusText(area) {
		switch (area){
			case(1):window.status="Next";
				break;
			case(2):window.status="Previous";
				break;
			case(3):window.status=" ";
				break;
			case(4):window.status="Click to see the bigger picture";
			break;
		}
}
function openPopUp(pageref) 
{
var popupref = 

window.open("","Zoom","scrollbars=yes,width=450,height=500,resizable=yes,toolbar=no,location=no,directories=no,status=no,menubar=no,copyhistory=no");

popupref.location=pageref;

if (document.images) popupref.focus();

}

function openWindow(pageref) 
{
var popupref = 

window.open("","Zoom","scrollbars=yes,width=740,height=1600,resizable=no,toolbar=no,location=no,directories=no,status=no,menubar=no,copyhistory=no");

popupref.location=pageref;

if (document.images) popupref.focus();

}

function switcher(place) {
	if (place==1) {
		document.Home.visibility = 'hidden';
		document.Sam.visibility = 'visible';	
	}

}