if (document.images) {
	biography_f2 = new Image(115 ,32); biography_f2.src = "graphics/biography_f2.png";
	biography_f1 = new Image(115 ,32); biography_f1.src = "graphics/biography.png";
	itinerary_f2 = new Image(110 ,32); itinerary_f2.src = "graphics/itinerary_f2.png";
	itinerary_f1 = new Image(110 ,32); itinerary_f1.src = "graphics/itinerary.png";
	recordings_f2 = new Image(126 ,32); recordings_f2.src = "graphics/recordings_f2.png";
	recordings_f1 = new Image(126 ,32); recordings_f1.src = "graphics/recordings.png";
	publications_f2 = new Image(141 ,32); publications_f2.src = "graphics/publications_f2.png";
	publications_f1 = new Image(141 ,32); publications_f1.src = "graphics/publications.png";
	discussion_f2 = new Image(123 ,32); discussion_f2.src = "graphics/discussion_f2.png";
	discussion_f1 = new Image(123 ,32); discussion_f1.src = "graphics/discussion.png";
	instruments_f2 = new Image(131 ,32); instruments_f2.src = "graphics/instruments_f2.png";
	instruments_f1 = new Image(131 ,32); instruments_f1.src = "graphics/instruments.png";
}


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;
}

/* Functions that swaps images. */
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_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 newPost() {
	post = document.getElementById('newPost');
	post.style.display = 'block';
}

function validatePost(form) {

	var errors = new Array();
	
	var strippedPost = form.message.value.replace(/\s/g, '');
	
	if (strippedPost.length <= 0) {
		errors.push('message');
	}
	
	var strippedAuthor = form.author.value.replace(/\s/g, '');
	if (strippedAuthor.length <= 0) {
		errors.push('name');
	}
	
	if (errors.length > 0) {
		alert('The following items are required: ' + errors.join(", "));
		return(false);
	} else {
		return(true);
	}
	
}