i=1;
function E(type)
{
var el=document.getElementById(type);	
el.style.display="block";
}

function D(type)
{
var el=document.getElementById(type);	
el.style.display="none";
}

function Next() {
if (i < c) {
	i++;
	if (i == c)  {D("r");}
	if (i == 2)  {E("l");}
	
	scr="img/d"+n+"scr"+i+".jpg";
	var img=document.getElementById("container");
	img.src=scr;
	}
}

function Prev() {
if (i > 1) {
	i--;
	var l=document.getElementById("l");
	var r=document.getElementById("r");
	if (i == 1)  {D("l");}
	if (i <= (c - 1))  {E("r");}
	
	scr="img/d"+n+"scr"+i+".jpg";
	var img=document.getElementById("container");
	img.src=scr;
	
	}
}

function open_demo(num,w,h) {
  str="/demo"+num+".html";
  myWin1= open(str, "displayWindow", "width="+w+",height="+h+", left="+((document.body.clientWidth-w)/2)+", top="+((document.body.clientHeight-h)/2)+", status=0,toolbar=0,menubar=0,scrollbars=0,resizable=0");
  myWin1.focus();
}