function popup(url){
ret = window.open(url, '', 'top=0, left=0, height=500, width=700, toobar=no, menubar=no, directories=no, status=no, scrollbars=no, resize=no'); 
};

function popupimage(url, x, y){
window.open(url, '', 'top=0, left=0, height=' + (y+20) + ', width=' + (x+20) + ', toobar=no, menubar=no, directories=no, status=no, scrollbars=no, resize=no'); 
};