/////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
//  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=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. 


////////////////////////////// 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){
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(){
  opacity_wait('fixeddiv', 100, 0, 1000, 8000);
  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;




/*Window fad in and fade out code*/

//Reference
//http://www.brainerror.net/scripts/javascript/blendtrans/

function opacity_wait(id, opacStart, opacEnd, millisec, timetowait) {
	//Add wait time and call opacity
	if(timetowait > 0)
		{
			//alert('with timetowait');
			//opacity(id, opacStart, opacEnd, millisec);
			setTimeout("opacity('" + id + "', " + opacStart + ", " + opacEnd + " , " + millisec + ");",timetowait);			
		}
	else{
			opacity(id, opacStart, opacEnd, millisec);
		}
}

function opacity(id, opacStart, opacEnd, millisec) {
	//speed for each frame
	//alert('opacity');
	var speed = Math.round(millisec / 100);
	var timer = 0;
	var object = document.getElementById(id).style; 
	//determine the direction for the blending, if start and end are the same nothing happens
	if(opacStart > opacEnd) {
		//alert("decreasing");
		for(i = opacStart; i >= opacEnd; i--) 
			{
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
			}		
		setTimeout("hideupdate('" + id + "')",millisec + 100);	
	} else if(opacStart < opacEnd) {
		//alert("update");
		setTimeout("showupdate('" + id + "')",1);
		for(i = opacStart; i <= opacEnd; i++)
			{
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
		}		
	}	
}

function showupdate(id) {
	//alert("none");
document.getElementById(id).style.display='block'; 
//document.getElementById("upcoming_events").style.display='Block';	
}

function hideupdate(id) {
	//alert("block");
document.getElementById(id).style.display='none'; 
//document.getElementById("upcoming_events").style.display='Block';	
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
	var object = document.getElementById(id).style	;	
	if(IE4 || IE5)object.filter = "alpha(opacity="+opacity+")";
	object.opacity = (opacity / 100);
	if(NS6)object.MozOpacity = (opacity / 100);
	object.KhtmlOpacity = (opacity / 100);	
}

function shiftOpacity(id, millisec) {
	//if an element is invisible, make it visible, else make it ivisible
	if(document.getElementById(id).style.opacity == 0) {
		opacity(id, 0, 100, millisec);
	} else {
		opacity(id, 100, 0, millisec);
	}
}

function blendimage(divid, imageid, imagefile, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 0;
	
	//set the current image as background
	document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";
	
	//make image transparent
	changeOpac(0, imageid);
	
	//make new image
	document.getElementById(imageid).src = imagefile;

	//fade in image
	for(i = 0; i <= 100; i++) {
		setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
		timer++;
	}
}

function currentOpac(id, opacEnd, millisec) {
	//standard opacity is 100
	var currentOpac = 100;
	
	//if the element has an opacity set, get it
	if(document.getElementById(id).style.opacity < 100) {
		currentOpac = document.getElementById(id).style.opacity * 100;
	}

	//call for the function that changes the opacity
	opacity(id, currentOpac, opacEnd, millisec)
}