function getUserName(){
	var user = "Rokopler???";
	if( window.document.getElementById ){
		if( window.document.getElementById( "sbiz_username" ) ){
			user = window.document.getElementById( "sbiz_username" ).firstChild.nodeValue;
			user = user.replace(/[\s-]+/g, "_" );
			user = user.replace(/ä/ig, "ae" );
			user = user.replace(/ü/ig, "ue" );
			user = user.replace(/ö/ig, "oe" );
			user = user.replace(/[<>\/"']+/g, "" );
		}
	}
	return user;
}
function openChat(){
	var user = getUserName();
	PopUp('chat/?user=' + user,'RokopChat',680,470,1,1);
}