function start() {
 makeCollapsible();
 document.getElementById('home').style.display='block';
}

function makeCollapsible() {
 myBody = document.getElementById('content');
 myBodyElements = myBody.getElementsByTagName('div');

 for (var i = 0; i < myBodyElements.length; i++) {
    myBodyElements[i].style.display='none';
 }

}

function unCollapse(targetElementName) {

 makeCollapsible();

 targetElement=document.getElementById(targetElementName);
 targetElement.style.display='block';

 myTagMenu = document.getElementById('pragmatism');
 myTags = myTagMenu.getElementsByTagName('li');

 for (var i = 0; i < myTags.length; i++) {
  myTags[i].style.backgroundColor='#eef';
 }

 // must zero out all other background color'd li tags

 targetName = 'link-' + targetElementName;
 targetLink = document.getElementById(targetName);
 targetLink.style.backgroundColor='#ccc';
}