// JavaScript Document
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];}
}

//sfHover = function() {
	//var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	//for (var i=0; i<sfEls.length; i++) {
		//sfEls[i].onmouseover=function() {
		//	this.className+=" sfhover";
		//}
		//sfEls[i].onmouseout=function() {
		//	this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		//}
	//}
//}
//if (window.attachEvent) window.attachEvent("onload", sfHover);

function newWindow(mypage,myname,w,h,features) {
  if(screen.width){
  var winl = (screen.width-w)/2;
  var wint = (screen.height-h)/2;
  }else{winl = 0;wint =0;}
  if (winl < 0) winl = 0;
  if (wint < 0) wint = 0;
  var settings = 'height=' + h + ',';
  settings += 'width=' + w + ',';
  settings += 'top=' + wint + ',';
  settings += 'left=' + winl + ',';
  settings += features;
  win = window.open(mypage,myname,settings);
  win.window.focus();
}

function validateform() {
    valid = true;
	errormsg = "Please complete the following fields: \n";
	var formName = validateform.arguments[0];
	for(i=1; i < validateform.arguments.length; i=i+2) {
    	var fieldName = validateform.arguments[i];
		var displayName = validateform.arguments[i+1];
		//alert (eval("document."+formName+"."+fieldName+".type"));
		if ((eval("document."+formName+"."+fieldName+".type") == "text") || (eval("document."+formName+"."+fieldName+".type") == "select-one")) {
			if (eval("document."+formName+"."+fieldName+".value") == "") {
				valid = false;
				errormsg += displayName + "\n";
			}
			
			//Check to ensure a valid email address has been entered
			if (fieldName == "email") {
				var emailFilter = /^.+@.+\..{2,3}$/;
				var illegalChars = /[\(\)\<\>\,\;\:\\\/\"\[\]]/;
				emailAddress = eval("document."+formName+"."+fieldName+".value");
				if (!(emailFilter.test(emailAddress))) { 
					valid = false;
					errormsg += "Please Enter a Valid Email Address\n";
				}
				if (emailAddress.match(illegalChars)) {
					valid = false;
					errormsg += "Please Check your email address, it contains illegal characters.\n";
				}
			}
			//Check for valid second email address matches first email address
			if (fieldName == "email2") {
				emailAddress2 = eval("document."+formName+"."+fieldName+".value");
				if (!(emailAddress2 == emailAddress)) { 
					valid = false;
					errormsg += "Please ensure your confirmation email address matches your email address.\n";
				}
			}
		} else if ((eval("document."+formName+"."+fieldName+".type") == "checkbox")) {
			var chks = document.getElementsByName(fieldName);
			if (chks[0].checked != 1){
				valid = false;
				errormsg += displayName + "\n";
			}
		} else {
			var btn = valButton1(eval("document."+formName+"."+fieldName+".value"));
			if (btn == null) {
				valid = false;
				errormsg += displayName + "\n";
			} else {
				//alert('Button value ' + btn + ' selected'); 
			}
		}
	}


	 var sessions = validateSessions(formName);
	//alert(sessions);
	if (!sessions) {
		valid = false;
		errormsg += "Select one session from each group" + "\n";	
	}


	if (valid == false) {
		alert(errormsg);
	}
    return valid;
}





function validateSessions(formName) {
	validsess = true;

	var thisform = formName;
	//alert(thisform);

	for ( var z in radio_groups ){
		myradiobutton = radio_groups[z];
		if (getSelectedRadio(eval("document."+thisform+"."+myradiobutton+"")) == -1) {
			validsess = false;
		}
	}

	for (i=0;i<check_groups.length; i++) {
		$checked = false;
		for (b=0;b<check_groups[i].length; b++) {
			var chks = document.getElementsByName('sess['+check_groups[i][b]+']');
			if (chks[0].checked){
				$checked = true;
			}
		}
		if (!$checked) {
			validsess = false;
		}
	}
	return validsess;

}