// We use this to expand and collapse divs in the sidebar
function showHideDiv(elementid, imgid, imgpath) {

var item = document.getElementById(elementid);
var myimage = document.getElementById(imgid);
var myimagepath = imgpath;

            if (item.style.display == 'none') {
              item.style.display = 'block';
			  var newImage = myimagepath + '/images/nav/' + imgid + '_minus.gif';
			  myimage.src = newImage;
            } else  {
              item.style.display = 'none';
			  var newImage = myimagepath + '/images/nav/' + imgid + '.gif';
			  myimage.src = newImage;
           }
		   
         
}




// We use this to EXPAND the hidden authors div in the sidebar and to hide the "show more authors" link.
function showMoreAuthors() {

var item = document.getElementById('hidden_authors');
item.style.display = 'block';

var item = document.getElementById('authors_link');
item.style.display = 'none';
         
}




// When we do our image switching for the expanding/collapsing sidebar divs, we need to preload the images for IE6 
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];}}
}





// http://bontragerconnection.com/ and http://www.willmaster.com/
// Version: July 28, 2007
var cX = 0; var cY = 0; var rX = 0; var rY = 0;
function UpdateCursorPosition(e){ cX = e.pageX; cY = e.pageY;}
function UpdateCursorPositionDocAll(e){ cX = event.clientX; cY = event.clientY;}
if(document.all) { document.onmousemove = UpdateCursorPositionDocAll; }
else { document.onmousemove = UpdateCursorPosition; }
function AssignPosition(d) {
if(self.pageYOffset) {
	rX = self.pageXOffset;
	rY = self.pageYOffset;
	}
else if(document.documentElement && document.documentElement.scrollTop) {
	rX = document.documentElement.scrollLeft;
	rY = document.documentElement.scrollTop;
	}
else if(document.body) {
	rX = document.body.scrollLeft;
	rY = document.body.scrollTop;
	}
if(document.all) {
	cX += rX; 
	cY += rY;
	}
d.style.left = (cX-300) + "px";
d.style.top = (cY-255) + "px";
}
function HideContent(d) {
if(d.length < 1) { return; }
document.getElementById(d).style.display = "none";
}
function ShowContent(d) {
if(d.length < 1) { return; }
var dd = document.getElementById(d);
AssignPosition(dd);
dd.style.display = "block";
}
function ReverseContentDisplay(d) {
if(d.length < 1) { return; }
var dd = document.getElementById(d);
AssignPosition(dd);
if(dd.style.display == "none") { dd.style.display = "block"; }
else { dd.style.display = "none"; }
}