/**
 * Script to log usage of ad blockers. This script merely counts the number
 * of impressions "lost" for statistical purposes.
 */
function logAdblockUsage( impressionCount )
{
	if( helios_multiad && !window.ADTECH_showAd )
	{
		var xmlhttp;
		if( window.XMLHttpRequest )
		{
			// code for IE7+, Firefox, Chrome, Opera, Safari
			xmlhttp=new XMLHttpRequest();
		}
		else if( window.ActiveXObject )
		{
			// code for IE6, IE5
			xmlhttp=new ActiveXObject( "Microsoft.XMLHTTP" );
		}

		// base url to logging script
		var baseURL = "/core/adblock/adblock_logger.php";

		// append impression count
		baseURL = baseURL + "?impressionCount=" + impressionCount;

		xmlhttp.open( "GET", baseURL, true );
		xmlhttp.send( null );
	}
}