var preloadedImage = new Array();

var numberOfCollections = 6;

//Initialising Image-Array
for (i = 1; i <= numberOfCollections; i++) {
	preloadedImage[i] = new Array();
	for (j = 1; j <= 6; j++) {
		preloadedImage[i][j] = new Image();
	}
}
preloadedImage[1][1].src="images/portfolio/content-portfolio-01_01.jpg";
preloadedImage[1][2].src="images/portfolio/content-portfolio-01_02.jpg";
preloadedImage[1][3].src="images/portfolio/content-portfolio-01_03.jpg";

preloadedImage[2][1].src="images/portfolio/content-portfolio-02_01.jpg";
preloadedImage[2][2].src="images/portfolio/content-portfolio-02_02.jpg";
preloadedImage[2][3].src="images/portfolio/content-portfolio-02_03.jpg";

preloadedImage[3][1].src="images/portfolio/content-portfolio-03_01.jpg";
preloadedImage[3][2].src="images/portfolio/content-portfolio-03_02.jpg";
preloadedImage[3][3].src="images/portfolio/content-portfolio-03_03.jpg";

preloadedImage[4][1].src="images/portfolio/content-portfolio-04_01.jpg";
preloadedImage[4][2].src="images/portfolio/content-portfolio-04_02.jpg";
preloadedImage[4][3].src="images/portfolio/content-portfolio-04_03.jpg";

preloadedImage[5][1].src="images/portfolio/content-portfolio-05_01.jpg";
preloadedImage[5][2].src="images/portfolio/content-portfolio-05_02.jpg";
preloadedImage[5][3].src="images/portfolio/content-portfolio-05_03.jpg";

preloadedImage[6][1].src="images/portfolio/content-portfolio-06_01.jpg";
preloadedImage[6][2].src="images/portfolio/content-portfolio-06_02.jpg";
preloadedImage[6][3].src="images/portfolio/content-portfolio-06_03.jpg";

function switchImg(collection, cid) {
	$("portfolio_sw_image_" + collection).src=preloadedImage[collection][cid].src;
//	new Effect.Opacity($("portfolio_sw_image_" + collection), {duration:0.2, from:0.2, to:1.0})
	$("a" + collection + "-" + cid).style.background="url(images/content-tab_active.gif) no-repeat 0px 0px";
	for (i = 1; i <= 6; i++) {
		if ( i != cid ) $("a" + collection + "-" + i).style.background="url(images/content-tab_inactive.gif) no-repeat 0px -4px";
	}
}