var currItem = 0;

arrDivs = new Array();

arrDivs[0] = "item_1";
arrDivs[1] = "item_2";
arrDivs[2] = "item_3";
arrDivs[3] = "item_4";
arrDivs[4] = "item_5";
arrDivs[5] = "item_6";
arrDivs[6] = "item_7";
arrDivs[7] = "item_8";
arrDivs[8] = "item_9";
arrDivs[9] = "item_10";
arrDivs[10] = "item_11";
arrDivs[11] = "item_12";
arrDivs[12] = "item_13";
arrDivs[13] = "item_14";
//arrDivs[14] = "item_15";
//arrDivs[15] = "item_16";


function showTour(dir) {

	var len = arrDivs.length;
	
	if (dir == 'up' && currItem < (len-1)) {
		currItem++;
	} else if (dir == 'back' && currItem > 0) {
		currItem--;
	} else if (dir == 'up') {
		currItem = "0";
	}
	
	hideAllItems();

	var item = getStyleObj(arrDivs[currItem]);
	
	item.visibility = "visible";
	
	var back_btn = getStyleObj('back_btn');
	var next_btn = getStyleObj('next_btn');	
	
	if (currItem > 0) {
		back_btn.visibility = "visible";
	} else {
		back_btn.visibility = "hidden";
	}
	
//	if (currItem < (len-1)) {
//		next_btn.visibility = "visible";
//	} else {
//		next_btn.visibility = "hidden";
//	}
	
}

function hideAllItems() {

	var len = arrDivs.length;
	var item;
	
	for (var i=0;i<len;i++) {
		item = getStyleObj(arrDivs[i]);
		item.visibility = "hidden";
	}

}