var dofade=false;     // ENABLES FADE-IN EFFECT FOR IE4+ AND NS6 ONLY
var center=true;     // 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.

function ietruebody(){
return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}

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

function getboxwidth(){
	if(navtxt){
		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(navtxt){
		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(navtxt){
		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 ietruebody().scrollTop;
}

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

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

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

function writetxt(text){
	if(isloaded && navtxt){
		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(navtxt){
		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 && navtxt){
		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";
		navtxt.style.visibility="visible";
	}
}

if(NS4)document.captureEvents(Event.MOUSEMOVE);
document.onmousemove=moveobj;
window.onload=function(){
	if(document.getElementById('navtxt')){
		navtxt=document.getElementById('navtxt');
	  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;