toggleThis = function() {
var header_object = document.getElementsByClassName('header');
var content_object = document.getElementsByClassName('content');


for (var i = 0; i < header_object.length; ++i) {
	var j = i+1;
	header_object[i].id = "nummer"+j+"-header";
	content_object[i].id = "nummer"+j+"-content";
}

slider.init('slider',1);
}

Event.observe(window, 'load', toggleThis, false);