var vwthinksmall_gall = new Array(); // variablenname = id des angezeigten Bildes
vwthinksmall_gall[0] = "images/VWC_Special_TS_01_gr.jpg";
vwthinksmall_gall[1] = "images/VWC_Special_TS_02_gr.jpg";
var vwthinksmall_gall_len = vwthinksmall_gall.length;

var volvonature_gall = new Array();
volvonature_gall[0] = "images/Volvo_by_Nature_01_gr.jpg";
volvonature_gall[1] = "images/Volvo_by_Nature_02_gr.jpg";
volvonature_gall[2] = "images/Volvo_by_Nature_03_gr.jpg";
var volvonature_gall_len = volvonature_gall.length;

var vwkaefer_gall = new Array();
vwkaefer_gall[0] = "images/VWC_Special_Kraftkaefer_01_gr.jpg";
vwkaefer_gall[1] = "images/VWC_Special_Kraftkaefer_02_gr.jpg";
var vwkaefer_gall_len = vwkaefer_gall.length;

var vwfriends_gall = new Array();
vwfriends_gall[0] = "images/VWC_Freunde_01_gr.jpg";
vwfriends_gall[1] = "images/VWC_Freunde_02_gr.jpg";
vwfriends_gall[2] = "images/VWC_Freunde_03_gr.jpg";
vwfriends_gall[3] = "images/VWC_Freunde_04_gr.jpg";
vwfriends_gall[4] = "images/VWC_Freunde_05_gr.jpg";
vwfriends_gall[5] = "images/VWC_Freunde_06_gr.jpg";
vwfriends_gall[6] = "images/VWC_Freunde_07_gr.jpg";
var vwfriends_gall_len = vwfriends_gall.length;

var sbc_gall = new Array();
sbc_gall[0] = "images/Bild_01_SBC.png";
sbc_gall[1] = "images/Bild_02_SBC.png";
sbc_gall[2] = "images/Bild_03_SBC.png";
var sbc_gall_len = sbc_gall.length;



function getElementsByClass(searchClass,node,tag) {

	var classElements = new Array();

	if ( node == null )

		node = document;

	if ( tag == null )

		tag = '*';

	var els = node.getElementsByTagName(tag);

	var elsLen = els.length;

	var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");

	for (i = 0, j = 0; i < elsLen; i++) {

		if ( pattern.test(els[i].className) ) {

			classElements[j] = els[i];

			j++;

		}

	}

	return classElements;
}


var galleryArray = getElementsByClass("gallery_nav");
for (i=0; i < galleryArray.length; i++) {
	galleryArray[i][0] = galleryArray[i].parentNode.getElementsByTagName("img")[0].id;
}

function preload() {
	for (i=0; i < galleryArray.length; i++) {
		var cur_gall = galleryArray[i][0];
		document.getElementById(cur_gall + "_cur_num").innerHTML = 1;
		document.getElementById(cur_gall + "_max_num").innerHTML = eval(cur_gall + "_len");
		document.getElementById(cur_gall).src = eval(cur_gall)[0];
	}
}



function changePicBack(obj) {		// Zurück-Funktion Galerie
	var cur_gall = obj.parentNode.parentNode.getElementsByTagName("img")[0].id;
	if (parseFloat(document.getElementById(cur_gall + "_cur_num").innerHTML) <= 1) {			// wenn beim ersten Bild
		document.getElementById(cur_gall + "_cur_num").innerHTML = eval(cur_gall + "_len");
		document.getElementById(cur_gall).src = eval(cur_gall)[eval(cur_gall).length-1];
	} else {
		document.getElementById(cur_gall + "_cur_num").innerHTML = document.getElementById(cur_gall + "_cur_num").innerHTML -1;
		document.getElementById(cur_gall).src = eval(cur_gall)[parseFloat(document.getElementById(cur_gall + "_cur_num").innerHTML) -1];
	}
}


function changePicForward(obj) {			// Vorwärts-Funktion Galerie
	var cur_gall = obj.parentNode.parentNode.getElementsByTagName("img")[0].id;
	if (parseFloat(document.getElementById(cur_gall + "_cur_num").innerHTML) >= eval(cur_gall + "_len")) { 		// wenn beim letzten Bild
		document.getElementById(cur_gall + "_cur_num").innerHTML = "1";
		document.getElementById(cur_gall).src = eval(cur_gall)[parseFloat(document.getElementById(cur_gall + "_cur_num").innerHTML) -1];
	} else {
		document.getElementById(cur_gall + "_cur_num").innerHTML = (parseFloat(document.getElementById(cur_gall + "_cur_num").innerHTML) + 1);
		document.getElementById(cur_gall).src = eval(cur_gall)[parseFloat(document.getElementById(cur_gall + "_cur_num").innerHTML) -1];
	}
}

preload();