/*fader.js
 * by Peter Belesis. v2.0 990907
 * Originally published and documented at http://www.dhtmlab.com/
 * Copyright (c) 1999 internet.com Corp. All Rights Reserved.
 * You may re-use this code on a public Web site only if this entire
 * copyright notice appears unchanged and you publicly display
 * on the Web page a link to http://www.dhtmlab.com/.
 *
 * Contact pbel@internet.com for all other uses.
*/

NS4 = (document.layers);
IE4 = (document.all);

boxWid = 120;
boxHgt = 140;
borWid = 0;
borCol = "red";
borSty = "double";
backCol = "#CCCCCC";
boxPad = 1;

txtAln = "left";
linHgt = "11pt";
fntFam = "Verdana,Arial,sans-serif";
fntCol = "black";
fntSiz = "8pt";
fntWgh = "bold";
fntSty = "normal";
lnkCol = "blue";
lnkDec = "none";
hovCol = "red";

gifSrc = "fade.gif";
gifInt = 60;

blendInt = 4;
blendDur = 1;
maxLoops = 0;

endWithFirst = true;
replayOnClick = true;

finite = (maxLoops > 0);
isOver = false;
loadCount = 0;
if (!window.prefix) prefix = "";

window.onload = countLoads;

if (NS4) {
	fadeImg = new Image();
	fadeImg.onload = countLoads;
	fadeImg.src = gifSrc;
}


function countLoads() {
	if (IE4) {
		setTimeout("initIt()");
	}
	else {
		loadCount++;
		if (loadCount==2) {
			origWidth = innerWidth;
			origHeight = innerHeight;
			window.onresize = function(){
				if (innerWidth==origWidth && innerHeight==origHeight) return;
				location.reload();
			}
			initIt();
		}
	}
}

function initIt(){
	if (!window.arNews) return;
    if (NS4) {
        if (!document.elFader) return;
		with(document.classes.newslink.A) {
			textDecoration = lnkDec;
			color = lnkCol;
			fontWeight = fntWgh;
			fontSize = fntSiz;
			fontStyle = fntSty;
			fontFamily = fntFam;
			lineHeight = linHgt;
			textAlign = txtAln;
		}
		with(document.classes.nolink.P) {
			color = fntCol;
			fontWeight = fntWgh;
			fontSize = fntSiz;
			fontStyle = fntSty;
			fontFamily = fntFam;
			lineHeight = linHgt;
			textAlign = txtAln;
		}
        elFader = document.elFader;
		with (elFader) {
			document.write(" ");
			document.close();
			bgColor = borCol;
			clip.width = boxWid;
			clip.height = boxHgt;
		}

		contWidth = boxWid - (borWid*2);
		contHeight = boxHgt - (borWid*2);
		elCont = new Layer(contWidth,elFader);
		with (elCont) {
			top = borWid;
			left = borWid;
			clip.width = contWidth;
			clip.height = contHeight;
			bgColor = backCol;
			visibility = "inherit";
		}

		newsWidth = contWidth - (boxPad*2);
		newsHeight = contHeight - (boxPad*2);
        elNews = new Layer(newsWidth,elCont);
		with (elNews) {
			top = boxPad;
			left = boxPad;
			clip.width = newsWidth ;
			clip.height = newsHeight;
		}
		
		elGif = new Layer(contWidth,elCont); 
        imStr = "<IMG SRC=" + gifSrc +" WIDTH="+ Math.max(fadeImg.width,(boxWid - (borWid*2))) +">"
        with (elGif) {
			document.write(imStr);
        	document.close();
			moveAbove(elNews);
		}

		imgHeight = elGif.document.height;
	
		slideInc = (imgHeight/(blendDur*1000/gifInt));
		startTop = -(imgHeight - boxHgt);

		elFader.visibility =  "show";
    }
    else {
        if (!window.elFader) return;
		elFader.innerHTML ="";
		if (!document.styleSheets.length) document.createStyleSheet();
		with (document.styleSheets(document.styleSheets.length-1)) {
			addRule("A.newslink","text-decoration:"+lnkDec+";color:"+ lnkCol);
			addRule("A.newslink:hover","color:"+ hovCol);
		}

		with (elFader.style) {
			width = boxWid;
			height = boxHgt;
			backgroundColor = backCol;
			overflow = "hidden";
			color = fntCol;
			// fontWeight = fntWgh;
			fontSize = fntSiz;
			fontStyle = fntSty;
			fontFamily = fntFam;
			lineHeight = linHgt;
			textAlign = txtAln;
			cursor = "default";
			visibility = "visible";
			borderWidth = borWid;
			borderStyle = borSty;
			borderColor = borCol;
			padding  = boxPad;	
			filter = "blendTrans(duration=" + blendDur + ")";
		}
		elFader.onselectstart = function(){return false};
    }

	elFader.onmouseover = function(){
		isOver = true;
	}
	elFader.onmouseout = function(){
		isOver = false;
		status = "";
	}

	startIt(0);
}


function startIt(ind){
    newsCount = ind;
    if (finite) loopCount = 0;
    doIt();
    blendTimer = setInterval("doIt()",blendInt*1000)
}

function doIt() {
    if (finite && loopCount==maxLoops) {
        endIt();
		return;
    }
	fadeIt();
    newsCount+=2;
    if (newsCount == arNews.length) {
        newsCount = 0;
        if (finite) loopCount++;
    }
}

function fadeIt(){
	dispStr = arNews[newsCount];
	linkStr = arNews[newsCount+1];
	isLink = linkStr.length;
	if (isLink) {
	    newsStr = "<A CLASS=newslink "
	            + "HREF=" + prefix + linkStr + ">"
	            + arNews[newsCount] + "</A>"
	}
	else {
		newsStr = (NS4) ? ("<P CLASS=nolink>"+dispStr+"</P>") : dispStr;
	}

    if (NS4) {
		elGif.top = startTop;
		elGif.visibility = "inherit";
		elNews.visibility = "hide";
        with (elNews.document) {
            write(newsStr);
            close();
        }
		elNews.visibility = "inherit";
    }
    else {
        elFader.filters.blendTrans.Apply();
        elFader.innerHTML = newsStr;
        elFader.filters.blendTrans.Play();
    }

	window.status = (isOver && isLink) ? (prefix + linkStr) : "";
    if (NS4) slideIt();
}

function slideIt(){
    elGif.top += slideInc;
    if (elGif.top >= 0) {elGif.visibility = "hide";return}
    setTimeout("slideIt()",gifInt);
}


function endIt(){
	clearInterval(blendTimer);
	if (endWithFirst) {
		newsCount = 0;
		fadeIt();
	}
	if (replayOnClick) {
		startIndex = endWithFirst ? 2 : 0;
		if (IE4) {
			elFader.title = "Double click to replay";
			elFader.ondblclick = function(){
				this.ondblclick = null;
				this.title = "";
				startIt(startIndex);
			}
		}
		else {
			elFader.captureEvents(Event.DBLCLICK);
			elFader.ondblclick = function(){
				this.releaseEvents(Event.DBLCLICK);
				startIt(startIndex);
				return false;
			}
		}
    }
}