function xwscrprev()
{
o=document.getElementById("xscreen");
if (o)
  {
  xphoto--;
  if (xphoto<1) xphoto=xscreenmax;
  o.src="pics/"+xwebimgs[xphoto]+"";
  xwsethref(xphoto);
  }
}

function xwscrnext()
{
o=document.getElementById("xscreen");
if (o)
  {
  xphoto++;
  if (xphoto>xscreenmax) xphoto=1;
  o.src="pics/"+xwebimgs[xphoto]+"";
  xwsethref(xphoto);
  }
}

function xnextscreen()
{
o=document.getElementById("xscreen");
if (o)
  {
  if (cxxc<=0)
    {
    var rr=xphoto;
    while (rr==xphoto)
      xphoto=Math.round((Math.random()*(xscreenmax-1)))+1;
    }
  else
    {
    xphoto++;
    if (xphoto>xscreenmax)
      xphoto=1;
    cxxc--;
    }
  o.src="pics/"+xwebimgs[xphoto]+"";
  xwsethref(xphoto);
  }
}

function xwsethref(xxphoto)
{
var oh=document.getElementById("xwurlhref");
var ot=document.getElementById("xwurltext");
if ((oh) && (ot))
  {
  if (xwebtexts[xxphoto])
    {
    oh.setAttribute("href",xweburls[xxphoto]);
    ot.innerHTML=xwebtexts[xxphoto];
    }
  else
    {
    oh.setAttribute("href","#");
    ot.innerHTML="";
    }
  }
}