// Variables
var buch_url = '/buchempfehlung/buchfeed.inc.php';
var buch = new sack(buch_url);
var page = 0;
var rate_fadein_opacity = 0;
var rate_fadeout_opacity = 100;
var is_ie = (navigator.userAgent.indexOf("Explorer") > -1);
var is_moz = (navigator.userAgent.indexOf("Firefox") > -1);
var is_opera = (navigator.userAgent.indexOf("Opera") > -1);
var is_being_rated = false;



// Process Post Ratings
function get_buch(page) {
	if(rate_fadeout_opacity > 0) {
		rate_fadeout_opacity -= 7;
		if(is_opera) {
			rate_fadein_opacity = 0;
		} else if(is_ie) {
			document.getElementById('buch_container').filters.alpha.opacity = rate_fadeout_opacity;
		} else if(is_moz) {
			document.getElementById('buch_container').style.MozOpacity = (rate_fadeout_opacity/100);
		}
		setTimeout("get_buch("+page+")", 20); 
	} else {
		rate_fadeout_opacity = 100;		
		buch.setVar("page", page);
		buch.method = 'GET';
		buch.element = 'buch_content';
		buch.runAJAX();
	}
}