var headerimages = new Array();

function nextheader(trig){	
	cont = $(trig).up('.headerimage');

	if(cont.id > 0)
		new Effect.Fade(cont,{duration:0.4});
}

function prevheader(trig){

	cont = $(trig).up('.headerimage');	
	nextId = ''+(Math.floor(cont.id)+1);	
	if((cont.id < headerimages.length) && ($(nextId)))
		new Effect.Appear($(nextId), {duration:0.4});
}



document.observe("dom:loaded", function(){
	headerimages = $$('.headerimage');
	headerimages.each(function(el, index){
		el.id = index; 
	});
	
	if(headerimages.length > 1){
		$$('.headerimage-skippers').each(
			function(skipper, index){
				skipper.show();
				
				if(index == 0)
					skipper.down('.headerimage-next').className = '';
					
				if((index+1) == headerimages.length)	
					skipper.down('.headerimage-prev').className = '';
				
			}
		);
	}
	
});