var index = 0;
var length = 15;

var imagesPhone = new Array(16);
imagesPhone[0] = 'images/phones/iphone_branding_TOS.png';
imagesPhone[1] = 'images/phones/blackberry_branding_nshmba.png';
imagesPhone[2] = 'images/phones/iphone_schedule.png';
imagesPhone[3] = 'images/phones/blackberry_schedule.png';
imagesPhone[4] = 'images/phones/iphone_calendar.png';
imagesPhone[5] = 'images/phones/bb_calendar.png';
imagesPhone[6] = 'images/phones/iphone_exhibitors.png';
imagesPhone[7] = 'images/phones/blackberry_exhibitors.png';
imagesPhone[8] = 'images/phones/iphone_notes.png';
imagesPhone[9] = 'images/phones/blackberry_notes.jpg';
imagesPhone[10] = 'images/phones/iphone_maps.png';
imagesPhone[11] = 'images/phones/bb_map.png';
imagesPhone[12] = 'images/phones/iphone_socialmedia.png';
imagesPhone[13] = 'images/phones/blackberry_socialmedia.png';
imagesPhone[14] = 'images/phones/iphone_more.png';
imagesPhone[15] = '';


function setImage(imageType) {
	if (eval(imageType)[index]) {
		document.getElementById("showImage").src=eval(imageType)[index];
	}
}
		
function setIndex(pos, imageType) {
	//for (i = 0; i <= length; i++) {
	//	document.getElementById(i).src="images/inactive_square.jpg";
	//}			
	//document.getElementById(pos).src="images/active_square.jpg";
	index = pos;
	setImage(imageType);
}
		
function next(imageType) {
	//document.getElementById(index).src="images/inactive_square.jpg";
	index++;
	if (index > length) {
		index = 0;
	}
	//document.getElementById(index).src="images/active_square.jpg";
	setImage(imageType);
}
		
function back(imageType) {
	//document.getElementById(index).src="images/inactive_square.jpg";
	index--;
	if (index < 0) {
		index = length;
	}
	//document.getElementById(index).src="images/active_square.jpg";
	setImage(imageType);
}