var dofade = true;     // ENABLES FADE-IN EFFECT FOR IE4+ AND NS6 ONLY
var center = false;     // CENTERS THE BOX UNER THE MOUSE, OTHERWISE DISPLAYS BOX TO THE RIGHT OF THE MOUSE
var centertext = false; // CENTERS THE TEXT INSIDE THE BOX. YOU CAN'T SIMPLY DO THIS VIA STYLE BECAUSE OF NS4.
                     // OTHERWISE, TEXT IS LEFT-JUSTIFIED. 

var NS4 = (navigator.appName.indexOf("Netscape")>=0 && !document.getElementById)? true : false;
var IE4 = (document.all && !document.getElementById)? true : false;
var IE5 = (document.getElementById && document.all)? true : false;
var NS6 = (document.getElementById && navigator.appName.indexOf("Netscape")>=0 )? true: false;
var W3C = (document.getElementById)? true : false;
var w_y, w_x, navtxt, boxheight, boxwidth;
var ishover  = false;
var isloaded = false;
var ieop = 0;
var op_id = 0;

function getwindowdims(){
     w_y = (NS4||NS6)? window.innerHeight : (IE5||IE4)? document.body.clientHeight : 0;
     w_x = (NS4||NS6)? window.innerWidth : (IE5||IE4)? document.body.clientWidth : 0;
}

function getboxwidth(){
     if(NS4)boxwidth=(navtxt.document.width)? navtxt.document.width : navtxt.clip.width;
     if(IE5||IE4)boxwidth=(navtxt.style.pixelWidth)? navtxt.style.pixelWidth : navtxt.offsetWidth;
     if(NS6)boxwidth=(navtxt.style.width)? parseInt(navtxt.style.width) : parseInt(navtxt.offsetWidth);
}

function getboxheight(){
     if(NS4)boxheight=(navtxt.document.height)? navtxt.document.height : navtxt.clip.height;
     if(IE4||IE5)boxheight=(navtxt.style.pixelHeight)? navtxt.style.pixelHeight : navtxt.offsetHeight;
     if(NS6)boxheight=parseInt(navtxt.offsetHeight);
}

function movenavtxt(x,y){
     if(NS4)navtxt.moveTo(x,y);
     if(W3C||IE4){
          navtxt.style.left=x+'px';
          navtxt.style.top=y+'px';
     }
}

function getpagescrolly(){
     if(NS4||NS6)return window.pageYOffset;
     if(IE5||IE4)return document.body.scrollTop;
}

function getpagescrollx(){
     if(NS4||NS6) return window.pageXOffset;
     if(IE5||IE4) return document.body.scrollLeft;
}

function writeindiv(text){
     if(NS4){
          navtxt.document.open();
          navtxt.document.write(text);
          navtxt.document.close();
     }
     if(W3C||IE4)navtxt.innerHTML=text;
}

//**** END UTILITY FUNCTIONS ****//

function writetxt(text){
     if(isloaded){
          if(text!=0){
               ishover = true;
               if(NS4) text='<div class="navtext">'+((centertext)?'<center>':'')+text+((centertext)?'</center>':'')+'</div>';
               writeindiv(text);
               getboxheight();
               if((W3C || IE4) && dofade){
                    ieop=0;
                    incropacity();
               }
          }
          else{
               if(NS4) navtxt.visibility="hide";
               if(IE4||W3C){
                    if(dofade)clearTimeout(op_id);
                    navtxt.style.visibility="hidden";
               }
               writeindiv('');
               ishover=false;
          }
     }
}

function incropacity(){
     if(ieop<=100){
          ieop+=7;
          if(IE4 || IE5)navtxt.style.filter="alpha(opacity="+ieop+")";
          if(NS6)navtxt.style.MozOpacity=ieop/100;
          op_id=setTimeout('incropacity()', 50);
     }
}

function moveobj(evt){
if(isloaded && ishover){
margin=(IE4||IE5)? 1 : 23;
if(NS6) if (document.height+27-window.innerHeight<0)margin=15;
if(NS4) if (document.height-window.innerHeight<0)margin=10;
//mx=(NS4||NS6)? evt.pageX : (IE5||IE4)? event.clientX : 0;
//my=(NS4||NS6)? evt.pageY : (IE5||IE4)? event.clientY : 0;
if (NS4){
mx=evt.pageX
my=evt.pageY
}
else if (NS6){
mx=evt.clientX
my=evt.clientY
}
else if (IE5){
mx=event.clientX
my=event.clientY
}
else if (IE4){
mx=0
my=0
}

if(NS4){
mx-=getpagescrollx();
my-=getpagescrolly();
}
xoff=(center)? mx-boxwidth/2 : mx+5;
yoff=(my+boxheight+30-getpagescrolly()+margin>=w_y)? -15-boxheight: 30;
movenavtxt( Math.min(w_x-boxwidth-margin , Math.max(2,xoff))+getpagescrollx() , my+yoff+getpagescrolly());
if(NS4)navtxt.visibility="show";
if(W3C||IE4)navtxt.style.visibility="visible";
}}

if(NS4)document.captureEvents(Event.MOUSEMOVE);
document.onmousemove=moveobj;
window.onload=function(){
  navtxt=(NS4)? document.layers['navtxt'] : (IE4)? document.all['navtxt'] : (W3C)? document.getElementById('navtxt') : null;
  getboxwidth();
  getboxheight();
  getwindowdims();
  isloaded=true;
  if((W3C || IE4) && centertext)navtxt.style.textAlign="center";
  if(W3C)navtxt.style.padding='4px';
  if(IE4 || IE5 && dofade)navtxt.style.filter="alpha(opacity=0)";
  }
window.onresize=getwindowdims;