function  changelang() {  
	var str = window.location.href;
	// Vality URL Flip - Production
	var where = str.indexOf('http://investors-it.safilo.com/phoenix.zhtml?c=221356');
	// CMID Flip - Development, Preview & Staging
	var CMID = str.indexOf('221356');

	if (where != -1) { 
		var pre = str.substring(0,where);
		// set number to chars from beginning of URL string (excluding http://) to the end of the CMID section of the string
	  	var subs  = str.substring(where,where+53);
	  	var post = str.substring(where+53,200);
	  	var result = pre + 'http://investors-en.safilo.com/phoenix.zhtml?c=195673' + post;
	  	window.location.href = result;
	} 
	else { 
		var pre = str.substring(0,CMID);
	  	var subs  = str.substring(CMID,CMID+6);
	  	var post = str.substring(CMID+6,200);
	  	var nuovo = pre + '195673' + post;
		window.location.href = nuovo;
	}
}