function imageSwap(aImage)
			{
			var imageSrc = aImage.src;
			if (imageSrc.indexOf("_f2") != -1)
				{
				aImage.src = imageSrc.replace("_f2", "");
				}
			else
				{
				aImage.src = imageSrc.replace(".png", "_f2.png");
				}
			}



		function showMyRow(elementID)
			{
			var row = document.getElementById(elementID);
			var image = document.getElementById(elementID + "_button");

			if (row.style.display == 'block')
				{
				row.style.display = 'none';
				image.src = image.src.replace("minus", "plus");
				}
			else
				{
				row.style.display = 'block';
				image.src = image.src.replace("plus", "minus");
				}
			}


		function action(aAction)
			{

			var doAction = true;
			//brings up a warning dialog if there is a second argument - which is the warning message
			//used in the "remove me" action on the myDetails page
			if (arguments.length > 1)
				doAction = confirm(arguments[1]);

			if (doAction)
				{
				//a second form exists for the engineering works period
				if (aAction.indexOf("changeEngWorksPeriod") != -1)
					{
					document.formEngWorks.action.value = aAction;
                    pageTracker._trackEvent('Scope Change Event', aAction);
					document.formEngWorks.submit();
					}
				else
					{
					//cforms
					var widget = document.form[aAction];
					if (widget != null)
						{
						widget.value = aAction;
						}
					//journeycheck
					document.form.action.value = aAction;
                    pageTracker._trackEvent('Route Event', aAction);
					document.form.submit();
					}
				}
			}
		function showHideFI(divId, linkId)
			{
			var div = document.getElementById(divId);
			var link = document.getElementById(linkId);

			if (div.style.display == 'block')
				{
				div.style.display = 'none';
				link.innerHTML = 'Show Further Information';
				}
			else
				{
				div.style.display = 'block';
				link.innerHTML = 'Hide Further Information';
				}
			}

		function showBox()
			{
			var showBoxId = document.getElementById('box_i');
			if (showBoxId.style.display == 'none')
				{
				showBoxId.style.display = 'block';
				}
			if ((version >= 5.5) && (version < 7) && (document.body.filters))
				{
					setImgForMessageBox();
				}
			}
		function hide(aId)
			{
			var element = document.getElementById(aId);
			element.style.display = "none";
			}

		function beginDrag(elementToDrag, event)
			{
			// Compute the distance between the upper-left corner of the element
			// and the mouse-click. The moveHandler function below needs these values.
			var deltaX = event.clientX - parseInt(elementToDrag.style.left);
			var deltaY = event.clientY - parseInt(elementToDrag.style.top);
			// Register the event handlers that will respond to the mousemove events
			// and the mouseup event that follow this mousedown event.
			if (document.addEventListener)
				{  // DOM Level 2 Event Model
				// Register capturing event handlers
				document.addEventListener("mousemove", moveHandler, true);
				document.addEventListener("mouseup", upHandler, true);
				}
			else if (document.attachEvent)
				{  // IE 5+ Event Model
				// In the IE event model, we capture events by calling
				// setCapture() on the element to capture them.

				elementToDrag.attachEvent("onmousemove", moveHandler);
				elementToDrag.attachEvent("onmouseup", upHandler);
				elementToDrag.setCapture();
				}
			else
				{  // IE 4 Event Model
				// In IE 4 we can't use attachEvent(  ), so assign the event handlers
				// directly after storing any previously assigned handlers, so they
				// can be restored. Note that this also relies on event bubbling.
				var oldmovehandler = document.onmousemove;
				var olduphandler = document.onmouseup;
				document.onmousemove = moveHandler;
				document.onmouseup = upHandler;
				}

			// We've handled this event. Don't let anybody else see it.
			if (event.stopPropagation) event.stopPropagation();  // DOM Level 2
			else event.cancelBubble = true;
			// IE

			// Now prevent any default action.
			if (event.preventDefault) event.preventDefault();   // DOM Level 2
			else event.returnValue = false;
			// IE

			/**
			 * This is the handler that captures mousemove events when an element
			 * is being dragged. It is responsible for moving the element.
			 **/
			function moveHandler(e)
				{
				if (!e) e = window.event;  // IE Event Model
				// Move the element to the current mouse position, adjusted as
				// necessary by the offset of the initial mouse-click.

				var posX = e.clientX - deltaX;
				var posY = e.clientY - deltaY;

				if(posX < 0)
					posX = 0;

				if(posY < 0)
					posY = 0;


				if(posX + 300 > document.body.clientWidth)
					posX = document.body.clientWidth - 300;

				if(posY + 303 > document.body.clientHeight)
					posY = document.body.clientHeight - 303;

				elementToDrag.style.left = posX + "px";
				elementToDrag.style.top = posY + "px";
				// And don't let anyone else see this event.
				if (e.stopPropagation) e.stopPropagation();  // DOM Level 2
				else e.cancelBubble = true;
				// IE
				}

			/**
			 * This is the handler that captures the final mouseup event that
			 * occurs at the end of a drag.
			 **/
			function upHandler(e)
				{
				if (!e) e = window.event;  // IE Event Model

				// Unregister the capturing event handlers.
				if (document.removeEventListener)
					{  // DOM Event Model
					document.removeEventListener("mouseup", upHandler, true);
					document.removeEventListener("mousemove", moveHandler, true);
					}
				else if (document.detachEvent)
					{  // IE 5+ Event Model
					elementToDrag.detachEvent("onmouseup", upHandler);
					elementToDrag.detachEvent("onmousemove", moveHandler);
					elementToDrag.releaseCapture();
					}
				else
					{  // IE 4 Event Model
					document.onmouseup = olduphandler;
					document.onmousemove = oldmovehandler;
					}

				// And don't let the event propagate any further.
				if (e.stopPropagation) e.stopPropagation();  // DOM Level 2
				else e.cancelBubble = true;
				// IE
				}
			}


		function setImgForMessageBox()
			{
			//set the image heights and widths for IE 6 and IE 5.5
			var elements = document.all;
			for(i=0;i<elements.length;i++)
				{
				if(elements[i].className=="helpBox-tr")
					{
					elements[i].style.height = "33";
					elements[i].style.width = "26";
					}
				else if(elements[i].className=="helpBox-tl")
					{
					elements[i].style.height = "33";
					elements[i].style.width = "20";
					}
				else if(elements[i].className=="helpBox-br")
					{
					elements[i].style.height = "20";
					elements[i].style.width = "26";
					}
				else if(elements[i].className=="helpBox-bl")
					{
					elements[i].style.height = "20";
					elements[i].style.width = "20";
					}
				else if(elements[i].className=="helpBox-closeButton")
					{
					elements[i].style.height = "20";
					elements[i].style.width = "87";
					}
				}
			}

function clearSavedRouteIfNoCookies(cookieName, selectElement, message)
	{
	var cookies = getCookie(cookieName);
	if(cookies==null)
		{
		var savedRoute = selectElement;

		if(savedRoute.length < 2)
			return;	

		for(i=0; i < savedRoute.length; i++)
			{
			savedRoute[i]= null;
			}
		savedRoute[0] = new Option(message, '-1');
		}
	}

function getCookie(name)
	{
	var dc = document.cookie;
	var prefix = name + "=";
	var begin = dc.indexOf("; " + prefix);
	if (begin == -1)
		{
		begin = dc.indexOf(prefix);
		if (begin != 0) return null;
		}
	else
		begin += 2;
	var end = document.cookie.indexOf(";", begin);
		if (end == -1)
			end = dc.length;
	return unescape(dc.substring(begin + prefix.length, end));
	}