function popup(mylink, windowname, width) {
if (! window.focus)return true;
var href;
if (typeof(mylink) == 'string')
   href=mylink;
else
   href=mylink.href;
window.open(href, windowname, 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=0,width=' + width + ',height=300,left = 100,top = 100');
return false;
}