/**
 *
 * @access public
 * @return void
 **/
var cover,pieces,piece,suffix,path;

window.onload = function(){
	if(document.getElementById('covers')){
		document.getElementById('covers').innerHTML = "<a href='#' onclick='showFront();return false;'>Vorderseite</a> | <a href='#' onclick='showBack();return false;'>R&uuml;ckseite</a>";
		cover = document.getElementById('cover').src;		
		path = cover.substr(0,cover.lastIndexOf("/")+1);
		pieces = cover.split("/");
		piece = pieces[pieces.length-1].split("_");
		cover = piece[0];
		suffix = piece[1].split(".");
		suffix = suffix[1];
	}
}

function showFront(){
	document.getElementById('cover').src = path+cover+"_front."+suffix;
}

function showBack(){
	document.getElementById('cover').src = path+cover+"_back."+suffix;	
}