// does the tracking parameter exist?
if (document.URL.indexOf("kennstDuEinenSemTracking=active") != -1) {

	// yes, set the cookie (expires in 30 days)
	var expirationTime = new Date();
	expirationTime.setTime(expirationTime.getTime() + (30 * 24 * 60 * 60 * 1000));
	document.cookie = "kennstDuEinenSemTracking=1;expires=" + expirationTime.toGMTString();
}

// does the cookie exist?
if (document.cookie.indexOf("kennstDuEinenSemTracking=1") != -1) {

	// yes, replace the phone numbers
	
	// select the phone number html tag with sizzle
	var phoneNumberTag = Sizzle('div.content table:last tr td p:last')[0];

	// does the tag exist?
	if (phoneNumberTag != undefined) {

		// yes, replace phone number
		phoneNumberTag.innerHTML = phoneNumberTag.innerHTML.replace(/0911 (.*){1} 40 75 60/, '0911 $1 701 000 28');
	}		
}