var LinkLayer = null;

function Init() {

  ope = window.opera?true:false;
  ns4 = document.layers?true:false;
  ie4 = document.all?true:false;
  dmc = document.getElementById?true:false;

  if (ns4) {
    g_StyleObj=function(o){return o;}
    pObj.prototype.show=function(){this.o.visibility='show';}
    pObj.prototype.hide=function(){this.o.visibility='hide';}
  }
  else {
    g_StyleObj=function(o){return o.style;}
    pObj.prototype.show=function(){this.s.visibility='visible';}
    pObj.prototype.hide=function(){this.s.visibility='hidden';}
  }

  if (ns4) g_Obj=function(id){return document.layers[id];}
  else if (dmc) g_Obj=function(id){return document.getElementById(id);}
  else if (ie4) g_Obj=function(id){return document.all[id];}

  if (ns4) {
    pObj.prototype.getWidth=function(){return this.o.document.width;}
    pObj.prototype.getHeight=function(){return this.o.document.height;}
  }
  else if (ope) {
    pObj.prototype.getWidth=function(){return this.s.pixelWidth;}
    pObj.prototype.getHeight=function(){return this.s.pixelHeight;}
  }
  else {
    pObj.prototype.getWidth=function(){return this.o.offsetWidth;}
    pObj.prototype.getHeight=function(){return this.o.offsetHeight;}
  }

  if (ope) pObj.prototype.setPos=function(x,y){this.s.pixelLeft=x;this.s.pixelTop=y;}
  else if (dmc) pObj.prototype.setPos=function(x,y){this.s.left=x+'px';this.s.top=y+'px';}
  else if (ie4) pObj.prototype.setPos=function(x,y){this.s.pixelLeft=x;this.s.pixelTop=y;}
  else if (ns4) pObj.prototype.setPos=function(x,y){this.o.moveTo(x,y);}

  ie_pos = (document.body && typeof document.body.scrollTop!="undefined");
  ns_pos = (typeof window.pageYOffset!='undefined');

  document.onmousemove = msHandler;
  if (ns4) {
    window.onmousemove = msHandler;
    window.captureEvents(Event.MOUSEMOVE);
    origWidth = innerWidth; origHeight = innerHeight;
    onresize = function(){if (innerWidth!=origWidth||innerHeight!=origHeight) location.reload();}}
}

function pObj(o) {this.o=o;this.s=g_StyleObj(o)}
function g_pObj(id) {return new pObj(g_Obj(id))}


function msHandler(e) {
  if (window.event) {
    docMsPosX = window.event.clientX;
    docMsPosY = window.event.clientY;
    if (ie_pos && !ope) {
      docMsPosX += document.body.scrollLeft;
      docMsPosY += document.body.scrollTop;
    }
  }
  else { docMsPosX = e.pageX; docMsPosY = e.pageY; }
  if (LinkLayer!=null) PositionBox();
}


function hideLinks() {
  if (LinkLayer!=null) LinkLayer.hide();
  LinkLayer = null;
}

function PositionBox() {
  var x = docMsPosX - document.body.clientWidth/3;
  var y = docMsPosY + 20;
  var w = LinkLayer.getWidth();
  var h = LinkLayer.getHeight();
  
  if (ns_pos && typeof window.innerHeight!='undefined') 
  {
    var xStart = window.pageXOffset;
    var xEnd = xStart+window.innerWidth;
    var yStart = window.pageYOffset;
    var yEnd = yStart+window.innerHeight;
  }
  else if (ie_pos) 
  {
    var xStart = document.body.scrollLeft;
    var xEnd = xStart+document.body.clientWidth;
    var yStart = document.body.scrollTop;
    var yEnd = yStart+document.body.clientHeight;
  }
  
  if ((x+w) >= xEnd)
  {
    x = docMsPosX-2*w-30; 
  }
  if (x < xStart)
  {
    x = xStart+2;
  }
  if ((y+h) >= yEnd)
  {
    y = yEnd-h-20;
  }
  if (y < yStart)
  {
    y = yStart+2;
  }
  
  LinkLayer.setPos(x,y);
}

function putLinks(id) {
  hideLinks();
  LinkLayer = g_pObj(id);
  PositionBox();
  LinkLayer.show();
}