var time = new Date();
var ordval= (time.getTime());
var adgroup = 'homepage'; // default value. use set_adgroup to specify actual value

function set_adgroup(grp)
{
	adgroup = grp;
}

function write_layer(layer_id, wide, high, position)
{
	var url_base = 'http://ad.doubleclick.net/';
	var adslot  = '/signaling-gateway.org/'+adgroup+';pos=' + position + ';';
	var sz = 'sz=' + wide + 'x' + high + ';';
	var ord = 'ord=' + ordval + '?';
	document.write ('<ilayer id="' + layer_id + '" visibility="hidden" width="' + wide + '" height="' + high + '"></ilayer>');
	document.write ('<nolayer>');
	document.write ('<iframe src="' + url_base + 'adi' + adslot + sz + ord + '" width="' + wide + '" height="'+ high + 
					'" marginwidth="0" marginheight="0" hspace="0" vspace="0" frameborder="0" scrolling="no">');
	document.write ('<a href="' + url_base + 'jump' + adslot + 'abr=!ie4;abr=!ie5;' + sz + ord + '">');
	document.write ('<img src="' + url_base + 'ad' + adslot +'abr=!ie4;abr=!ie5;' + sz + ord + '" border="0" width="' + wide + 
					'" height="' + high + '" hspace="0" align="center" /></a></iframe>');
	document.write ('</nolayer>');
}

function show_layer(layer_id, wide, high, position)
{
	var url_base = 'http://ad.doubleclick.net/';
	var adslot  = '/signaling-gateway.org/'+adgroup+';pos=' + position + ';';
	var sz = 'sz=' + wide + 'x' + high + ';';
	var ord = 'ord=' + ordval + '?';
	document.writeln ('<layer src="' + url_base + 'adl' + adslot + sz + ord + '" visibility="hidden" width="'+ wide +
						'" height="'+ high +'" onload="moveToAbsolute('+layer_id+'.pageX,'+layer_id+'.pageY);clip.height='+ high +
						';clip.width='+ wide +';visibility=\'show\';"></layer>');
}