// JavaScript Document
var numSites = 8;
var currentSite = 1;

function show(i) {
	if (i && i > 0 && i <= numSites)
		thisScreen = i;
	else {
		thisScreen = 1;
	}
	screenDiv = document.getElementById('screen');
	screenDiv.innerHTML = '<img src="/skins/drugrevenue/images/sites/screen_' + thisScreen +'.jpg" width="166" height="121">';
}
function prev()
{
	if (!currentSite) currentSite = 1;
	cSite = (currentSite - 1);
	
	prevPage = document.getElementById('prev');
	nextPage = document.getElementById('next');
	if(cSite > 0)
	{
		nextPage.innerHTML = cSite + 1;
		if((cSite - 1) > 0)
		{
			prevPage.innerHTML = (cSite -1);
		} else {
			prevPage.innerHTML = '';
		}
		show(cSite);
		currentSite = cSite;
	} else {
		prevPage.innerHTML = '';
	}
}
function next()
{
	if (!currentSite) currentSite = 1;
	cSite = (currentSite + 1);
	//alert (cSite)
	prevPage = document.getElementById('prev');
	nextPage = document.getElementById('next');
	if(currentSite < numSites)
	{
		if((cSite) < numSites)
			nextPage.innerHTML = cSite + 1;
		else 
			nextPage.innerHTML = '';
		if((currentSite) > 0)
			prevPage.innerHTML = (currentSite);
		show(cSite);
		currentSite = cSite;
	} else {
		nextPage.innerHTML = '';
	}
	
	
}