function popup(mylink, windowname)
{
	if (! window.focus)return true;
	var href;
	if (typeof(mylink) == 'string'){
	   href=mylink;
	}else{
	   href=mylink.href;
	}
	window.open(href, windowname, 'width=815,height=620,scrollbars=yes');
	//return false;
}

function open_next(url) {

	var winpops=window.open(url,"","width=800px,height=600px,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes")
    self.close();

    return false;
}

function open_prev(url) {

	var winpops=window.open(url,"","width=800px,height=600px,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes")
    self.close();

    return false;
}