var pics = new Array();
var curPicIdx = 0;

function showPic(id) {
	for(var i = 0; i < pics.length; i++) {
		if(pics[i][0] == id) {
			document.getElementById('picContainer').src = pics[i][1];
			document.getElementById('picText').innerText = pics[i][2];
			document.getElementById('picContainer').width = pics[i][3];
			document.getElementById('picContainer').height = pics[i][4];
			break;
		}
	}
}

function showNextPic() {
	if(pics.length == 0)
		return;
	
	curPicIdx++;
	
	if(curPicIdx >= pics.length)
		curPicIdx = 0;

	showPic(pics[curPicIdx][0]);	
}

function showPrevPic() {
	if(pics.length == 0)
		return;
	
	curPicIdx--;
	
	if(curPicIdx < 0)
		curPicIdx = pics.length - 1;

	showPic(pics[curPicIdx][0]);	
}