function filterURLs(str)
{
	var charIndex = -1;
	var urls = new Array("goregasm.com");

	/* Convert to lowercase string */
	var referrerURL = str.toLowerCase();
	
	var index = 0;
	var index1 = urls.length;
	
	while ((charIndex == -1) && (index < index1))
	{
		/* Test for sub-string */
		charIndex = referrerURL.indexOf(urls[index]);
		
		if (charIndex != -1)
			++charIndex;
		else
			++index;
	}
	
	referrerURL = null;
	urls = null;
	
	return charIndex;
}