function intro(w){
	for(var i=1;i<4;i++){
		document.getElementById("claim"+i).style.color = "#707173";
	}
	if(w>0)document.getElementById("claim"+w).style.color = "#CD071E";
	
	for(var i=0;i<4;i++){
		document.getElementById("intro_txt"+i).style.display = "none";
		document.getElementById("pic_bild"+i).style.display = "none";
	}
	document.getElementById("intro_txt"+w).style.display = "block";
	document.getElementById("pic_bild"+w).style.display = "block";
}