/*
 * Standart script for imagegalerie component.
 *
 *
 * LICENSE: This file is copyrighted by NetNexus IT Services Johannes Pfeiffer,
 * http://netnexus.de. To use, alter or distribute this file you need a written
 * permission from Johannes Pfeiffer, NetNexus IT Services, Auf den Äckern 1,
 * 66887 St. Julian, Germany. Contact by mail via info@netnexus.de.
 *
 * @category   NetNexus JP-CMS
 * @package    Standarttemplates
 * @author     Johannes M. Pfeiffer <johannespfeiffer@netnexus.de>
 * @copyright  NetNexus IT Services Johannes Pfeiffer
 * @license    Commercial licence, contact me for details
 */


var dia_fadearray=new Array() //array to cache fadeshow instances
var dia_fadeclear=new Array() //array to cache corresponding clearinterval pointers

var dia_dom=(document.getElementById) //modern dia_dom browsers
var dia_iebrowser=document.all

function fadeshow(theimages, width, height, borderwidth, delay){
    this.delay=delay
    this.degree=0
    this.curimageindex=0
    this.nextimageindex=1
    dia_fadearray[dia_fadearray.length]=this
    this.slideshowid=dia_fadearray.length-1
    this.canvasbase="canvas" + this.slideshowid
    this.curcanvas=this.canvasbase+"_0"
    this.imageborder=parseInt(borderwidth)

    var fadewidth = width;
    var fadeheight = height;

    this.postimages=new Array() //preload images
    for (p=0;p<theimages.length;p++){
        this.postimages[p]=new Image();
        this.postimages[p].src=theimages[p][0];
    }

    if (dia_iebrowser&&dia_dom||dia_dom)
        document.write('<div id="master'+this.slideshowid+'" style="position:relative;width:'+fadewidth+'px;height:'+fadeheight+'px;overflow:hidden;"><div id="'+this.canvasbase+'_0" style="position:absolute;width:'+fadewidth+'px;height:'+fadeheight+'px;top:0;left:0;filter:progid:DXImageTransform.Microsoft.alpha(opacity=10);opacity:0.1;-moz-opacity:0.1;-khtml-opacity:0.1;"></div><div id="'+this.canvasbase+'_1" style="position:absolute;width:'+fadewidth+'px;height:'+fadeheight+'px;top:0;left:0;filter:progid:DXImageTransform.Microsoft.alpha(opacity=10);opacity:0.1;-moz-opacity:0.1;-khtml-opacity:0.1;"></div></div>')
    else
        document.write('<div><img name="defaultslide'+this.slideshowid+'" src="'+this.postimages[0].src+'"></div>')

    if (dia_iebrowser&&dia_dom||dia_dom)
        this.startit()
    else{
        this.curimageindex++
        setInterval("dia_fadearray["+this.slideshowid+"].rotateimage()", this.delay)
    }
}

function fadepic(obj){
    if (obj.degree<100){
        obj.degree+=10
        if (obj.tempobj.filters&&obj.tempobj.filters[0]){
            if (typeof obj.tempobj.filters[0].opacity=="number") //if IE6+
                obj.tempobj.filters[0].opacity=obj.degree
            else //else if IE5.5-
                obj.tempobj.style.filter="alpha(opacity="+obj.degree+")"
        }
        else if (obj.tempobj.style.MozOpacity)
            obj.tempobj.style.MozOpacity=obj.degree/101
        else if (obj.tempobj.style.KhtmlOpacity)
            obj.tempobj.style.KhtmlOpacity=obj.degree/100
        else if (obj.tempobj.style.opacity&&!obj.tempobj.filters)
            obj.tempobj.style.opacity=obj.degree/101
    }
    else{
        clearInterval(dia_fadeclear[obj.slideshowid])
        obj.nextcanvas=(obj.curcanvas==obj.canvasbase+"_0")? obj.canvasbase+"_0" : obj.canvasbase+"_1"
        obj.tempobj=dia_iebrowser? dia_iebrowser[obj.nextcanvas] : document.getElementById(obj.nextcanvas)
        obj.populateslide(obj.tempobj, obj.nextimageindex);
        obj.tempobj.style.display="none";
        obj.nextimageindex=(obj.nextimageindex<obj.postimages.length-1)? obj.nextimageindex+1 : 0
        setTimeout("dia_fadearray["+obj.slideshowid+"].rotateimage()", obj.delay)
    }
}

fadeshow.prototype.populateslide=function(picobj, picindex){
    var slideHTML=""
    slideHTML+='<img src="'+this.postimages[picindex].src+'" border="'+this.imageborder+'px">'
    picobj.innerHTML=slideHTML
}



fadeshow.prototype.rotateimage=function(){
    if (dia_iebrowser&&dia_dom||dia_dom){
        this.resetit()
        var crossobj=this.tempobj=dia_iebrowser? dia_iebrowser[this.curcanvas] : document.getElementById(this.curcanvas)
        crossobj.style.zIndex++
        crossobj.style.display ="block";
        dia_fadeclear[this.slideshowid]=setInterval("fadepic(dia_fadearray["+this.slideshowid+"])",50)
        this.curcanvas=(this.curcanvas==this.canvasbase+"_0")? this.canvasbase+"_1" : this.canvasbase+"_0"
    }
    else {
        var ns4imgobj=document.images['defaultslide'+this.slideshowid]
        ns4imgobj.src=this.postimages[this.curimageindex].src
    }
    this.curimageindex=(this.curimageindex<this.postimages.length-1)? this.curimageindex+1 : 0
}

fadeshow.prototype.resetit=function(){
    this.degree=10
    var crossobj=dia_iebrowser? dia_iebrowser[this.curcanvas] : document.getElementById(this.curcanvas)
    if (crossobj.filters&&crossobj.filters[0]){
        if (typeof crossobj.filters[0].opacity=="number") //if IE6+
            crossobj.filters(0).opacity=this.degree
        else //else if IE5.5-
            crossobj.style.filter="alpha(opacity="+this.degree+")"
    }
    else if (crossobj.style.MozOpacity)
        crossobj.style.MozOpacity=this.degree/101
    else if (crossobj.style.KhtmlOpacity)
        crossobj.style.KhtmlOpacity=this.degree/100
    else if (crossobj.style.opacity&&!crossobj.filters)
        crossobj.style.opacity=this.degree/101
}


fadeshow.prototype.startit=function(){
    var crossobj=dia_iebrowser? dia_iebrowser[this.curcanvas] : document.getElementById(this.curcanvas)
    this.populateslide(crossobj, this.curimageindex)
    this.rotateimage()
}