/*fader.js

 * by Peter Belesis. v3.0 991130

 * Copyright (c) 1999 Peter Belesis. All Rights Reserved.

 * Originally published and documented at http://www.dhtmlab.com/

 * License to use is granted if and only if this entire copyright notice

 * is included.

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

*/



//3.0 added more browser checks:

NS4 = (document.layers);

IE4 = (document.all);



appVer = navigator.appVersion;

IEmac = (IE4 && appVer.indexOf("Mac") != -1);

IE4mac = (IEmac && appVer.indexOf("MSIE 4") != -1);

IE40mac = (IE4mac && appVer.indexOf("4.0;") != -1);

IE45mac = (IE4mac && appVer.indexOf("4.5;") != -1);

NSpre401 = (NS4 && (parseFloat(appVer) <= 4.01));

NSpre403 = (NS4 && (parseFloat(appVer) <= 4.03));



//3.0 added next 2 line for backward compatibility

FDRjustFlip = (window.FDRjustFlip) ? FDRjustFlip : false;

FDRhdlineCount = (window.FDRhdlineCount) ? FDRhdlineCount : 1;



FDRfinite = (FDRmaxLoops > 0);

FDRisOver = false;

FDRloadCount = 0;



//3.0 set blendTimer to null for IE40mac

blendTimer = null;



if (!window.prefix) prefix = "";

window.onload = FDRcountLoads;



//3.0 modified NS-only code to account for flipper and lack of NS onload/onerror handlers

if (NS4) {

	if(FDRjustFlip || NSpre403) {

		totalLoads = 1;

		FDRfadeImg = new Object();

		FDRfadeImg.width = FDRboxWid - (FDRborWid*2);;

	}

	else {

		totalLoads = 2;

		FDRfadeImg = new Image();

		FDRfadeImg.onload = FDRcountLoads;

		FDRfadeImg.onerror = FDRcountLoads;

		FDRfadeImg.src = FDRgifSrc;

	}

}



//3.0 added event argument for NS

function FDRcountLoads(e) {

	if (IE4) {

		setTimeout("FDRinit()",1);

	}

	else {

//3.0 check for event type

		if(e.type == "error") FDRjustFlip = true; 

		FDRloadCount++;

		if (FDRloadCount==totalLoads) {

			origWidth = innerWidth;

			origHeight = innerHeight;

			window.onresize = function(){

				if (innerWidth==origWidth && innerHeight==origHeight) return;

				location.reload();

			}

			FDRinit();

		}

	}

}



function FDRinit(){

	if(!window.arNews) {

		if(!window.arTXT || !window.arURL) return;

		if(arTXT.length != arURL.length) return;

		arNews = [];

		for (i=0;i<arTXT.length;i++){

			arNews[arNews.length] = arTXT[i];

			arNews[arNews.length] = arURL[i];

		}

	}



    if (NS4) {

        if (!document.elFader) return;

		with(document.classes.newslink.A) {

			textDecoration = FDRlnkDec;

			color = FDRlnkCol;

			fontWeight = FDRfntWgh;

			fontSize = FDRfntSiz;

			fontStyle = FDRfntSty;

			fontFamily = FDRfntFam;

			lineHeight = FDRlinHgt;

			textAlign = FDRtxtAln;

		}

		with(document.classes.nolink.P) {

			color = FDRfntCol;

			fontWeight = FDRfntWgh;

			fontSize = FDRfntSiz;

			fontStyle = FDRfntSty;

			fontFamily = FDRfntFam;

			lineHeight = FDRlinHgt;

			textAlign = FDRtxtAln;

		}

        elFader = document.elFader;

		with (elFader) {

			document.write(" ");

			document.close();

			bgColor = FDRborCol;

			clip.width = FDRboxWid;

			clip.height = FDRboxHgt;

		}



		contWidth = FDRboxWid - (FDRborWid*2);

		contHeight = FDRboxHgt - (FDRborWid*2);

		elCont = new Layer(contWidth,elFader);

		with (elCont) {

			top = FDRborWid;

			left = FDRborWid;

			clip.width = contWidth;

			clip.height = contHeight;

			bgColor = FDRbackCol;

			visibility = "inherit";

		}



		newsWidth = contWidth - (FDRboxPad*2);

		newsHeight = contHeight - (FDRboxPad*2);

        elNews = new Layer(newsWidth,elCont);

		with (elNews) {

			top = FDRboxPad;

			left = FDRboxPad;

			clip.width = newsWidth ;

			clip.height = newsHeight;

		}



//3.0 made NS GIF use conditional on flipper choice		

		if (!FDRjustFlip) {

			elGif = new Layer(contWidth,elCont); 

	        imStr = "<IMG SRC='" + FDRgifSrc +"' WIDTH="+ Math.max(FDRfadeImg.width,(FDRboxWid - (FDRborWid*2)));

//3.0 onError handler added to in-line GIF code for NS 4.03-

			imStr += (NSpre403) ? " onError='window.FDRjustFlip = true'>" : ">";

	        with (elGif) {

				document.write(imStr);

	        	document.close();

				moveAbove(elNews);

			}

	

			imgHeight = elGif.document.height;

			slideInc = (imgHeight/(FDRblendDur*1000/FDRgifInt));

			startTop = -(imgHeight - FDRboxHgt);

		}



		elFader.visibility =  "show";

    }

    else {

        if (!window.elFader) return;

		elFader.innerHTML ="";

		if(IE4mac) {

			document.body.insertAdjacentHTML("BeforeBegin","<STYLE></STYLE>");

		}

		else {

			if (!document.styleSheets.length) document.createStyleSheet();

		}

		with (document.styleSheets(document.styleSheets.length-1)) {

			addRule("A.newslink","text-decoration:"+FDRlnkDec+";color:"+ FDRlnkCol);

			addRule("A.newslink:hover","color:"+ FDRhovCol);

		}



		with (elFader.style) {

//3.0 added box width/height adjustments for IEmac

			errorOffset = (IE4mac) ? (FDRboxPad + FDRborWid) : 0;

			width = FDRboxWid - (errorOffset * 2);

			height = FDRboxHgt - (errorOffset * 2);

			if(IE4mac && !IE45mac){

				pixelLeft = elFader.offsetLeft + errorOffset;

				pixelTop = elFader.offsetTop + errorOffset;

			}



			backgroundColor = FDRbackCol;

			overflow = "hidden";

			color = FDRfntCol;

			fontWeight = FDRfntWgh;

			fontSize = FDRfntSiz;

			fontStyle = FDRfntSty;

			fontFamily = FDRfntFam;

			lineHeight = FDRlinHgt;

			textAlign = FDRtxtAln;

			cursor = "default";

			visibility = "visible";

			borderWidth = FDRborWid;

			borderStyle = FDRborSty;

			borderColor = FDRborCol;

			padding  = FDRboxPad;



//3.0 filter application conditional on fader use

			if(!FDRjustFlip) filter = "blendTrans(duration=" + FDRblendDur + ")";

		}

		elFader.onselectstart = function(){return false};



		IEhasFilters = (elFader.filters.blendTrans) ? true : false;



    }



//3.0 NS mouseover/out handlers applied only in 4.02+

	if (!NSpre401) {

		elFader.onmouseover = function (){

			FDRisOver = true;

		}

		elFader.onmouseout = function(){

			FDRisOver = false;

			status = "";

		}

	}

	

	FDRstart(0);

}



function FDRstart(ind){

    newsCount = ind;

    if (FDRfinite) loopCount = 0;

    FDRdo();

    blendTimer = setInterval("FDRdo()",FDRblendInt*1000)

}



function FDRdo() {

//3.0 check for blendTimer value for IE40mac:

	if(!blendTimer && loopCount>0) return;



    if (FDRfinite && loopCount==FDRmaxLoops) {

        FDRend();

		return;

    }

	FDRfade();

//3.0 omitted next line; newsCount incremented elsewhere

//    newsCount += 2;



    if (newsCount == arNews.length) {

        newsCount = 0;

        if (FDRfinite) loopCount++;

    }

}



//3.0 added function for display string creation

function FDRmakeStr(){

	tempStr = "";

	for (i=0;i<FDRhdlineCount;i++){

		if(newsCount>=arNews.length)break;

		dispStr = arNews[newsCount];

		linkStr = arNews[newsCount+1];

		isLink = linkStr.length;

		if (isLink) {

			tempStr += "<P><A CLASS=newslink "

					+ "HREF='../../gatevpa/" + prefix + linkStr + "'>"

		            + dispStr + "</A></P>"

		}

		else {

			tempStr += ((NS4) ? "<P CLASS=nolink>" : "<P>") +dispStr+"</P>";



		}

        if(IE40mac) tempStr +="<BR>";

		newsCount += 2;

	}

	return tempStr;

}



function FDRfade(){

//3.0 newsStr now created in other function and returned here

	newsStr = FDRmakeStr();



    if (NS4) {

//3.0 made GIF manipulation conditional on fader use

		if (!FDRjustFlip) {

			elGif.top = startTop;

			elGif.visibility = "inherit";

		}



		elNews.visibility = "hide";

        with (elNews.document) {

            write(newsStr);

            close();

        }

		elNews.visibility = "inherit";

    }

    else {

        if(IEhasFilters)elFader.filters.blendTrans.Apply();

        elFader.innerHTML = newsStr;

        if(IEhasFilters)elFader.filters.blendTrans.Play();

    }



//3.0 status bar display now only when single headline displayed

	if(FDRhdlineCount==1) window.status = (FDRisOver && isLink) ? (prefix + linkStr) : "";



//3.0 NS GIF sliding condiional on fader use

    if (NS4 && !FDRjustFlip) FDRslide();

}



function FDRslide(){

    elGif.top += slideInc;

    if (elGif.top >= 0) {elGif.visibility = "hide";return}

    setTimeout("FDRslide()",FDRgifInt);

}



//3.0 new function for NS to avoid literal function declaration

//    and allow double-click for 4.01a- versions

function FDRdblClickNS(){

	elFader.releaseEvents(Event.DBLCLICK);

	FDRstart(startIndex);

	return false;

}



function FDRend(){

	clearInterval(blendTimer);



//3.0 set blendTimer to null for IE40mac

	blendTimer = null;



	if (FDRendWithFirst) {

		newsCount = 0;

		FDRfade();

	}

	if (FDRreplayOnClick) {



//3.0 startIndex dependent on headline count

		startIndex = FDRendWithFirst ? (FDRhdlineCount * 2) : 0;

		if (IE4) {

			elFader.title = "Double click to replay";

			elFader.ondblclick = function(){

				this.ondblclick = null;

				this.title = "";

				FDRstart(startIndex);

			}

		}

		else {

			elFader.captureEvents(Event.DBLCLICK);



//3.0 moved handler to new function

			elFader.ondblclick = FDRdblClickNS;



		}

    }

}