/* First thing is to declare global variables
   to contain the X and Y coordinates of the
   mouse cursor. */
var currentX = 0;
var currentY = 0;
var showtip = 1;

/* Use "object sniffing" technique to determine
   if the browser has the captureEvent method.
   This tells us if the client is a Mozilla-type browser.
   If so, we tell the document object to 
   capture the MOUSEMOVE event. */
if (document.captureEvent){
  document.captureEvent(Event.MOUSEMOVE);
}

/* The getMousePosition() function will be the
   event-handling function that sets
   currentX and currentY. */
function getMousePosition(evt){

/* Internet Explorer and Mozilla have differences
   both in the way they implement events and the
   way they determine x/y coordinates. */
  if (window.event){
    
    /* This is the Internet Explorer way.
       Adds the x and y coordinates relative to the screen
       to the number of pixels the user has scrolled 
       horizontally and vertically. */
    currentX = window.event.clientX + document.body.scrollLeft;
    currentY = window.event.clientY + document.body.scrollTop;
  }
  else if (evt){
    
    /* In Mozilla/Netscape browsers, you just need to access
       the pageX and pageY properties to determine coordinates. */
    currentX = evt.pageX;
    currentY = evt.pageY;
  }
}

// register getMousePosition() as an event handler for the onmousemove event.
document.onmousemove = getMousePosition;


/* The positionElement function will place an object
   at the coordinates (currentX+10, currentY+10).
   Parameter: any valid ID attribute of an element. */
function positionElement(id){
  // set elem to the element with specified id.
  elem = document.getElementById(id);
  if (elem){
    /* If the element exists, set the CSS style "left"
       to currentX + 10, and the CSS style "top" to
       currentY + 10. */
	//need to account for floating layer
    var currentwidth = document.body.offsetWidth;
	var flpos = (currentwidth/2)-400
elem.style.left = (currentX-(flpos+55)) + "px";
elem.style.top = (currentY+50) + "px";
  }
}


 function isNull(a) 
 {
      return typeof a == 'object' && !a;
 }

/* hideToolTip will set the CSS "visibility" property to
   "hidden" for an element whose ID attribute is passed
   to the function. */
function hideToolTip(id){
  elem = document.getElementById(id);
  if (elem)  {
    elem.style.visibility="hidden";
  }
}

/* showToolTip will set the CSS "visibility" property to
   "visible" for an element whose ID attribute is passed
   to the function. */
function showToolTip(id,thismessage){
	showtip = readCookie('showtips');//if there is a cookie set, use it
	if (isNull(readCookie('showtips'))) {showtip=1};//otherwise we will show tooptils
  elem = document.getElementById(id);
  if (elem && showtip==1) {
    elem.style.visibility="visible";
	elem.innerHTML=thismessage
	
  }
}

function createCookie(name,value,days)
{
	if (days)
	{
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name)
{
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++)
	{
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name)
{
	createCookie(name,"",-1);
}