startList = function() {
if (document.all&&document.getElementById) {
navRoot = document.getElementById("nav");
for (i=0; i<navRoot.childNodes.length; i++) {
node = navRoot.childNodes[i];
if (node.nodeName=="LI") {
node.onmouseover=function() {
this.className+=" over";
  }
  node.onmouseout=function() {
  this.className=this.className.replace(" over", "");
   }
   }
  }
 }
}
window.onload=startList;

function showPic(whichpic, pagenum) {
 var directory = "images/"; var extension = ".gif";
 document.getElementById('page') .src = directory + pagenum + extension;
 document.getElementById('placeholder') .src = whichpic.href;
 window.scrollTo(0,0);
 window.focus();
 return false;
 }
 
 function prompt() {
 var yesPlease = confirm("PDF versions of our paper may exceed 25MB.  Continue?");
 if (!yesPlease) {return false;} }