var nomweb=(document.domain).replace("www.","");
function popup(url,width,height){
 var left=(screen.width  - width)/2;
 var top=(screen.height - height)/2;
 var params = 'width='+width+', height='+height;
 params += ', top='+top+', left='+left;
 params += ', directories=no';
 params += ', location=no';
 params += ', locationbar=no';
 params += ', menubar=no';
 params += ', resizable=no';
 params += ', scrollbars=no';
 params += ', status=yes';
 params += ', titlebar=no';
 params += ', toolbar=no';
 newwin=window.open(url,"_venper",params);
 if (window.focus) { newwin.focus() }
 return false;
}