/////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
//  ALTTXT V1.2
//  BY: BRIAN GOSSELIN OF SCRIPTASYLUM.COM
//  ADDED FADING EFFECT FOR IE4+ AND NS6+ ONLY AND OPTIMIZED THE CODE A BIT.
//  SCRIPT FEATURED ON DYNAMIC DRIVE (http://www.dynamicdrive.com)
//  Modifed by DD for doctype bug on Nov 13th, 2003


var dofade=false;     // 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. 


////////////////////////////// NO NEED TO EDIT BEYOND THIS POINT //////////////////////////////////////

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(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 ietruebody().scrollTop;
}

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

function writeindiv(text){
	navtxt.innerHTML=text;
}
function readindiv( obj_name ){
	return document.getElementById( obj_name ).innerHTML;
}
function get_Class ( obj_name ) {
	return document.getElementById( obj_name ).className;
}
function set_Class ( obj_name, classname ) {
	document.getElementById( obj_name ).className = classname;
}


//**** END UTILITY FUNCTIONS ****//
function hidetxt() {
	if(NS4)navtxt.visibility="hide";
	if(IE4||W3C){
		if(dofade)clearTimeout(op_id);
		navtxt.style.visibility="hidden";
	}
	writeindiv('');
	ishover=false;
}
function writetxt( obj_name ){
	if(isloaded){
		text = readindiv( obj_name );
		classname = get_Class ( obj_name );
		ishover=true;
		if(NS4)text='<div class="'+classname+'">'+((centertext)?'<center>':'')+text+((centertext)?'</center>':'')+'</div>';
		writeindiv(text);
		set_Class ( "navtxt", classname );
		getboxheight();
		if((W3C || IE4) && dofade){
			ieop=0;
			incropacity();
		}
	}
}

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;