function einblenden(element_id) {
    document.getElementById(element_id).style.display="block";
}
function ausblenden(element_id) {
    document.getElementById(element_id).style.display="none";
}


function openwindow (url) {
 fenster=window.open(url, "_blank", "width=600,height=400,status=no,scrollbars=yes,resizable=yes");
 fenster.focus();
 return false;
}

function oPW(filter) {
	var url='show.php?filter='+filter;
	window.open(url,'histr_popup','height=768, width=1024,menubar=0,statusbar=no,toolbar=no');
}