document.onkeydown = PageNavigation;

function PageNavigation (event)
{
   if (!document.getElementById)
      return;

   if (window.event)
      event = window.event;

   if (event.ctrlKey)
   {
      var key = (event.keyCode ? event.keyCode : (event.which ? event.which : null) );
      if (!key)
         return;

      var link = null;
      if (key == 37)
         link = document.getElementById('next_page');
      else if (key == 39)
         link = document.getElementById('previous_page');

      if (link && link.href)
         document.location = link.href;
   }
} 


function show_comment()
	{
	if (window.XMLHttpRequest)	req = new XMLHttpRequest();
	else if (window.ActiveXObject)  req = new ActiveXObject("Microsoft.XMLHTTP");

	if (req)
		{
		req.onreadystatechange = exec;
		req.open("GET", "comment.php?number="+comment_number, true);
		req.send(null);
		}
	}

function exec()
	{
if(req.readyState != 4) return;
document.getElementById("comment"+comment_number).innerHTML=req.responseText;
document.getElementById("comment"+comment_number).style.display='block';
document.getElementById("cn"+comment_number).style.display='none';
document.getElementById("cf"+comment_number).style.display='block';
	}

function hide_comment()
	{
document.getElementById("comment"+comment_number).style.display='none';
document.getElementById("cn"+comment_number).style.display='block';
document.getElementById("cf"+comment_number).style.display='none';
	}

function show_preview(id,name,width,height)
{
document.getElementById('img'+id).src='trumbs/'+name+'_tr.gif';
document.getElementById('_preview'+id).style.width=width+"px";
document.getElementById('_preview'+id).style.height=height+"px";
document.getElementById('_preview'+id).style.marginTop=(height+2)*-1+"px";

if(navigator.appName=="Netscape")
	document.getElementById('_preview'+id).style.marginLeft="-6px";
else if(navigator.appName=="Opera")
	document.getElementById('_preview'+id).style.marginLeft="-1px";

document.getElementById('_preview'+id).style.display='inline';
}

function hide_preview(id)
{
document.getElementById('_preview'+id).style.display='none';
}

function getElementPosition (elemId)
{
  var offsetTrail = document.getElementById(elemId);
  var offsetLeft = 0;
  var offsetTop = 0;
  while (offsetTrail) {
    offsetLeft += offsetTrail.offsetLeft;
    offsetTop += offsetTrail.offsetTop;
    offsetTrail = offsetTrail.offsetParent;
  }
  return {left:offsetLeft, top:offsetTop};
}


function page_over(cel)
{
myColor=cel.style.backgroundColor;
cel.style.backgroundColor='#616161';
cel.style.cursor='pointer';
}

function page_out(cel)
{
cel.style.backgroundColor=myColor;
cel.style.cursor='default';
}