var photos=new Array()
var text=new Array()
var oldSel=0
var what=0


var next_page="/dsite.taf?IdNav=286";
//
var phase_name = "Het eigenlijke delven ";

//Change the below variables to reference your own images. You may have as many images in the slider as you wish
photos[0]="/images/biblio/biblio-69-443.jpg"
photos[1]="/images/biblio/biblio-69-444.jpg"
photos[2]="/images/biblio/biblio-69-445.jpg"

//change coresponding description
text[0]="Het delven van blokken blauwe hardsteen gebeurt op basis van de structuur van de steenlaag. Die bestaat uit bijna horizontale lagen. De delvingsactiviteiten creëren een immense trap in de rots."
text[1]="De blokken worden eerst verticaal gezaagd met sleufzaagmachines."
text[2]="De gezaagde blokken worden dwars gesneden met behulp van diamantkabelzaagmachines."

function backward() {
	if (what>0) {
		oldSel = what;
		what--;
		///
		set_slider(what);
	} else {
		window.location = previous_page;
	}
}

function forward() {
	if (what<photos.length-1) {
		oldSel = what;
		what++;
		//
		set_slider(what);
	} else {
		window.location = next_page;
	}
}

function set_counter(w) {
	var l = photos.length;
	var c = phase_name+" <font color='#666666'>"+(w+1)+"/"+l+"</font>";
	change_txt('visit_pic_holder_title',c);
}

function change_txt(id, texte) {
	var element = null;
	if (document.getElementById) {
		element = document.getElementById(id);
	} else if (document.all) {
		element = document.all[id];
	}
	if (element) {
		element.innerHTML = texte;
	}
}

function init_slider() {
	change_txt('visit_pic_holder_txt',text[0]);
	set_counter(0);
}

function set_slider(w) {
	document.images.photoslider.src = photos[w];
	change_txt('visit_pic_holder_txt', text[w]);
	set_counter(w);
	what = w;
}

function set_selected(w) {
	oldSel = what;
	set_slider(w);
}

window.onload = init_slider;



var a
a= new Array();
a[0]=new Image;
a[0].src="/images/biblio/biblio-69-456.gif";
a[1]=new Image;
a[1].src="/images/biblio/biblio-69-455.gif";

function roll(img,nb) {
    eval("img.src=a["+nb+"].src");
}


var b
b= new Array();
b[0]=new Image;
b[0].src="/images/biblio/biblio-69-458.gif";
b[1]=new Image;
b[1].src="/images/biblio/biblio-69-457.gif";

function roll(img,nb) {
    eval("img.src=b["+nb+"].src");
}