/* Begin - Scripts from Jeremy Keith's DOM Scripting (*except where indicated)*/
//
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
	  window.onload = func;
	}
	else {
	  window.onload = function () {
		  oldonload();
		  func();
		}
	}
}

//
function insertAfter(newElement, targetElement) {
  var parent = targetElement.parentNode;
  if (parent.lastChild == targetElement) {
	  parent.appendChild(newElement);
	}
	else {
	  parent.insertBefore(newElement, targetElement.nextSibling);
	}
}

//
function addClass(element, value) {
  if (!element.className) {
	  element.className = value;
	}
	else {
	  newClassName = element.className;
	  newClassName += " ";
	  newClassName += value;
	  element.className = newClassName;
	}
}

//
function moveElement(elementID, final_x, final_y, interval) {
  if (!document.getElementById) return false;
  if (!document.getElementById(elementID)) return false;
  var elem = document.getElementById(elementID);
  if (elem.movement) {
	  clearTimeout(elem.movement);
	}  
	if (!elem.style.left) {
    elem.style.left = "0px";
  }
  if (!elem.style.top) {
    elem.style.top = "0px";
  }
	var xpos = parseInt(elem.style.left);
	var ypos = parseInt(elem.style.top);
	
	if (xpos == final_x && ypos == final_y) return true;
	if (xpos < final_x) {
	  var dist = Math.ceil((final_x - xpos)/10);
	  xpos = xpos + dist;
	}
	if (xpos > final_x) {
	  var dist = Math.ceil((xpos - final_x)/10);
	  xpos = xpos - dist;
	}
	if (ypos < final_y) {
	  var dist = Math.ceil((final_y - ypos)/10);
	  ypos = ypos + dist;
	}
	if (ypos > final_y) {
	  var dist = Math.ceil((ypos - final_y)/10);
	  ypos = ypos - dist;
	}
	elem.style.left = xpos + "px";
	elem.style.top = ypos + "px";
	var repeat = "moveElement('"+elementID+"',"+final_x+","+final_y+","+interval+")";
	elem.movement = setTimeout(repeat,interval);
}

//
function highlightPage() {
  if (!document.getElementsByTagName) return false;
  if (!document.getElementById) return false;
  if (!document.getElementById("navigation")) return false;
	var currenturl = window.location.href;                //Modified BE
  var nav = document.getElementById("navigation");
  var links = nav.getElementsByTagName("a");
  for (var i=0; i<links.length; i++) {
	  var linkurl = links[i].getAttribute("href");
	  //var currenturl = window.location.href;  Original
	  if (currenturl.indexOf(linkurl) != -1) {
		  //links[i].className = "here";                    Original Code from book
		  addClass(links[i], "here");                       //Modified BE
		}
	}
}
//
addLoadEvent(highlightPage);
/* End - Scripts from Jeremy Keith's DOM Scripting (*except where indicated)*/